FileVault failed and now I can't turn it off.

I'm seeing the same thing. I have an early 2008 MBP that is running Lion. I keep getting "There was a problem enabling FileVault. Problems were encountered with the disk "Macintosh HD". Please turn off FileVault, verify and (if necessary) repair the disk with disk utility, and try enabling FileVault again." When I click the default "Turn Off FileVault", I get the error you reported.

Weird thing is, the recovery partition's disk utility showed this volume as greyed out and its status as "Locked and Unmounted". I couldn't access it at all.

To answer your first question, then, you're not the only one, but so far we're the only two reporting it. I wish I had an answer for how to resolve it. I'm hoping it's a more common problem and Apple has a fix in the works.

Same exact problem here with a 24" white iMac.

Exact problem!!!
Someone can help us?

https://discussions.apple.com/thread/3201286

Same problem here. But in the second attempt, I didn't turned it off (I pressed "Cancel" instead of "Turn it off" in the popup window). Now the System Pref Pane tells me it is ON! I ran the following command in the terminal:

<code>diskutil corestorage list</code>

And I get this (not the "Conversion Status: Failed")!

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group 12182BCA-A5DA-40FD-937B-A54A3089C586

=========================================================

Name: MacDisk

Sequence: 1

Free Space: 0 B (0 B)

|

+-< Physical Volume 74C02F11-600B-47A7-8BF3-8072E2977FCE

| ----------------------------------------------------

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 319213174784 B (319.2 GB)

|

+-> Logical Volume Family F01553E8-4B71-4685-BFAF-0703571C3281

----------------------------------------------------------

Sequence: 9

Encryption Status: Unlocked

Encryption Type: AES-XTS

Encryption Context: Present

Conversion Status: Failed

Has Encrypted Extents: Yes

Conversion Direction: forward

|

+-> Logical Volume C9870D66-2267-46FD-8979-44523E77D930

---------------------------------------------------

Disk: disk1

Status: Online

Sequence: 4

Size (Total): 318894403584 B (318.9 GB)

Size (Converted): 125854285824 B (125.9 GB)

Revertible: Yes (unlock and decryption required)

LV Name: MacDisk

Volume Name: MacDisk

Content Hint: Apple_HFS

So from here, I don;t know... When I repair my disk from a bott DVD, Disk Utility says it is OK.

I have exactly the same problem. I hope soon there will be a soluiton.

More or less same issue for me, I was able to turn ON filevault and now I'm unable to turn it OFF (backward for me)

https://discussions.apple.com/thread/3203278

Only thing I get in console logs is the following error

System Preferences: *** CoreStorage conversion failed with mainError: -69750; detailError: 0

And in my case when executing the corestorage list ... same issue except it's "backward" for me 🙂

$ diskutil corestorage list

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group

=========================================================

Name: Macintosh HD

Sequence: 1

Free Space: 0 B (0 B)

|

+-< Physical Volume

| ----------------------------------------------------

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 499248103424 B (499.2 GB)

|

+-> Logical Volume Family

----------------------------------------------------------

Sequence: 18

Encryption Status: Unlocked

Encryption Type: None

Encryption Context: Present

Conversion Status: Failed

Has Encrypted Extents: Yes

Conversion Direction: backward

|

+-> Logical Volume

---------------------------------------------------

Disk: disk1

Status: Online

Sequence: 4

Size (Total): 498929332224 B (498.9 GB)

Size (Converted): -none-

Revertible: Yes (unlock and decryption required)

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

Message was edited by: ldgbxl

So after that

I tried doing this manually

$ diskutil coreStorage revert disk1

Authentication required for reverting a locked volume

Passphrase: ***

Started CoreStorage operation on disk0s2

Error: -69749: Unable to unlock the Core Storage volume

Funny error because it shows ulocked above

So I tried to unlock it ...

$ diskutil coreStorage unlockVolume (masqued UID)

Passphrase: ***

Error beginning CoreStorage Logical Volume unlock: The target Core Storage volume is not encrypted (-69755)

So in the end ..

I'm stuck because I can't revert and unencrypt a disk that is not unlocked.

However I cannot unlock a disk that is not encrypted.

All that while the disk is shown in the list as Unlocked and Encrypted.

Encryption Status: Unlocked

Encryption Type: None

Encryption Context: Present

Conversion Status: Failed

Has Encrypted Extents: Yes

Conversion Direction: backward

And therefore I cannot do anything 🙂

This needs serious fixing Apple ... There is obviously "something wrong"

I've been experiencing the same issue on my MacBook Pro. It worked fine on my iMac though. I just got off the phone with Apple, and they gathered information from my laptop and will forward the info to the engineers for analysis. Hopefully they will come up with a solution for us.

Do you get any errors in /var/log/kernel.log?

I don't know for the OP but in my case ... actually I did get some error in there after re-looking carefully

Happened while decrypting

Since then it's blocked into "Conversion Status: Failed"

Jul 23 15:37:15 kernel[0]: CoreStorageGroup::completeIORequest - underrun detected, expected = 0x40000, actual = 0x20000, lvg = "Macintosh HD"

Jul 23 15:37:15 kernel[0]: CoreStorageGroup::completeIORequest - underrun detected, expected = 0x200, actual = 0x40000, lvg = "Macintosh HD"

Jul 23 15:37:15 kernel[0]: CoreStorage: bgt_write: error e00002e7 while trying to write 512 bytes at offset 153797787648

Jul 23 15:37:15 kernel[0]: CoreStorage: bgt_single_io_write: returning 0xe00002e7

Jul 23 15:37:15 kernel[0]: CoreStorage: bgt_do_lv_io: returning 0xe00002e7

Jul 23 15:37:15 kernel[0]: CoreStorage: background encryption/decryption: write failed with -536870169, offset=153797787648

Jul 23 15:37:15 kernel[0]: CoreStorage: background_transform: committing transaction from error/early exit path

Jul 23 15:37:15 kernel[0]: CoreStorage: background_transform: exiting with 0

What's in your /var/log/kernel.log when this failed? You can search "CoreStorage" to find related logs.

And what kind of machine (processor, machine type, memory size) is it? Thanks!

I have a MacBook Pro (middle 2010), 2.4 Ghz Intel Core i5, 4GB

in kernel.log I have this log with "CoreStorage":

Jul 20 21:29:19 Marco-Solito kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 20 21:29:19 Marco-Solito kernel[0]: CoreStorageGroup::handleOpen(0xffffff800bf80a00) client 0xffffff800bf80a00 pv B56FC370-791B-47CA-9907-C6C4E607D069 failed to open for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5).

Jul 20 21:29:19 Marco-Solito kernel[0]: CoreStorageGroup::adminDoneGated failed to start LVG

Jul 20 21:30:30 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 20 21:30:30 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 20 21:31:13 Marco-Solito kernel[0]: CoreStorage: lv_validate_prop_changes: cannot change immutable property 'com.apple.corestorage.lvf.sequence' (is_family=1).

Jul 20 21:31:13 Marco-Solito kernel[0]: CoreStorage: validate_properties_internal: lv_validate_prop_changes returned -536870202

Jul 20 21:31:13 Marco-Solito kernel[0]: CoreStorageFamily::commitFamilyProperties: lvf_validate_properties returned -536870202

Jul 20 21:31:13 Marco-Solito kernel[0]: CoreStorageGroup::updateFamily: commitFamilyProperties returned -536870202

Jul 21 00:21:57 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395298078720.

Jul 21 00:24:03 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395306692608.

Jul 21 00:24:17 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395306809344.

Jul 21 00:24:17 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395306809344, read 0 bytes

Jul 21 00:24:32 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395307367936.

Jul 21 00:24:32 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395307367936, read 0 bytes

Jul 21 00:24:33 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: new bad sector at logical offset 395306809344, physical offset 395306809344, length 512, errno e00002ca.

Jul 21 00:24:33 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: new bad sector at logical offset 395307367936, physical offset 395307367936, length 512, errno e00002ca.

Jul 21 00:24:46 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395306168320.

Jul 21 00:24:59 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395306250752.

Jul 21 00:24:59 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395306250752, read 0 bytes

Jul 21 00:25:00 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: new bad sector at logical offset 395306250752, physical offset 395306250752, length 512, errno e00002ca.

Jul 21 00:25:14 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395305119744.

Jul 21 00:25:28 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395305133056.

Jul 21 00:25:28 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395305133056, read 0 bytes

Jul 21 00:25:44 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395305691648.

Jul 21 00:25:44 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395305691648, read 0 bytes

Jul 21 00:25:45 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: new bad sector at logical offset 395305133056, physical offset 395305133056, length 512, errno e00002ca.

Jul 21 00:25:45 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: new bad sector at logical offset 395305691648, physical offset 395305691648, length 512, errno e00002ca.

Jul 21 00:26:00 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395303809024.

Jul 21 00:26:13 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395303891968.

Jul 21 00:26:13 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395303891968, read 0 bytes

Jul 21 00:26:14 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: new bad sector at logical offset 395303891968, physical offset 395303891968, length 512, errno e00002ca.

Jul 21 00:26:28 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395301711872.

Jul 21 00:26:43 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395302216192.

Jul 21 00:26:43 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395302216192, read 0 bytes

Jul 21 00:26:58 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395302760448.

Jul 21 00:27:12 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395302774784.

Jul 21 00:27:12 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395302774784, read 0 bytes

Jul 21 00:27:27 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395303333376.

Jul 21 00:27:27 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395303333376, read 0 bytes

Jul 21 00:27:29 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: new bad sector at logical offset 395302216192, physical offset 395302216192, length 512, errno e00002ca.

Jul 21 00:27:29 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: new bad sector at logical offset 395302774784, physical offset 395302774784, length 512, errno e00002ca.

Jul 21 00:27:29 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: new bad sector at logical offset 395303333376, physical offset 395303333376, length 512, errno e00002ca.

Jul 21 00:27:43 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395299614720.

Jul 21 00:27:58 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395299857408.

Jul 21 00:27:58 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395299857408, read 0 bytes

Jul 21 00:28:12 Marco-Solito kernel[0]: CoreStorageGroup::completeIORequest - error 0xe00002ca detected for LVG "Macintosh HD" (4381AA52-6F2F-404B-8661-8E299B508EA5), pv B56FC370-791B-47CA-9907-C6C4E607D069, near LV byte offset = 395300416512.

Jul 21 00:28:12 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: error e00002ca while trying to read 512 bytes at offset 395300416512, read 0 bytes

Jul 21 00:28:12 Marco-Solito kernel[0]: CoreStorage: background_transform: too many IO errors, aborting!

Jul 21 00:28:12 Marco-Solito kernel[0]: CoreStorage: bgt_single_io_read: returning 0x53

Jul 21 00:28:12 Marco-Solito kernel[0]: CoreStorage: bgt_do_lv_io: returning 0x53

Jul 21 00:28:12 Marco-Solito kernel[0]: CoreStorage: background encryption/decryption: read failed with 83, offset=395299614720

Jul 21 00:28:12 Marco-Solito kernel[0]: CoreStorage: background_transform: committing transaction from error/early exit path

Jul 21 00:28:12 Marco-Solito kernel[0]: CoreStorage: background_transform: exiting with 83

Jul 21 01:06:00 Marco-Solito kernel[0]: CoreStorage: lv_validate_prop_changes: cannot change immutable property 'com.apple.corestorage.lvf.sequence' (is_family=1).

Jul 21 01:06:00 Marco-Solito kernel[0]: CoreStorage: validate_properties_internal: lv_validate_prop_changes returned -536870202

Jul 21 01:06:00 Marco-Solito kernel[0]: CoreStorageFamily::commitFamilyProperties: lvf_validate_properties returned -536870202

Jul 21 01:06:00 Marco-Solito kernel[0]: CoreStorageGroup::updateFamily: commitFamilyProperties returned -536870202

Jul 21 01:06:01 Marco-Solito kernel[0]: CoreStorage: lv_validate_prop_changes: cannot change immutable property 'com.apple.corestorage.lvf.sequence' (is_family=1).

Jul 21 01:06:01 Marco-Solito kernel[0]: CoreStorage: validate_properties_internal: lv_validate_prop_changes returned -536870202

Jul 21 01:06:01 Marco-Solito kernel[0]: CoreStorageFamily::commitFamilyProperties: lvf_validate_properties returned -536870202

Jul 21 01:06:01 Marco-Solito kernel[0]: CoreStorageGroup::updateFamily: commitFamilyProperties returned -536870202

Jul 21 01:06:01 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: successfully read error pattern at physical offset 395302216192

Jul 21 01:06:01 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: successfully read error pattern at physical offset 395302774784

Jul 21 01:06:01 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: successfully read error pattern at physical offset 395303333376

Jul 21 01:06:02 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: successfully read error pattern at physical offset 395305133056

Jul 21 01:06:02 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: successfully read error pattern at physical offset 395305691648

Jul 21 01:06:02 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: successfully read error pattern at physical offset 395303891968

Jul 21 01:06:04 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: successfully read error pattern at physical offset 395306809344

Jul 21 01:06:04 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: successfully read error pattern at physical offset 395307367936

Jul 21 01:06:04 Marco-Solito kernel[0]: CoreStorage: bgt_check_io_errors: successfully read error pattern at physical offset 395306250752

Jul 21 01:07:14 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 21 01:07:14 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 21 01:12:53 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 21 01:12:53 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 21 01:24:26 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 21 01:24:26 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 21 01:27:02 localhost kernel[0]: CoreStorageFsck: LVG on disk0s2 was repaired

Jul 21 01:27:02 localhost kernel[0]: CoreStorageFsck: <Bootstrap TXG#859@1843 : Live Segments : verify_seghdr : verify_blkhdr> invalid field value

Jul 21 01:27:02 localhost kernel[0]: CoreStorageFsck: <Bootstrap TXG#859@1843 : Live Segments : kill chkpoint txg @1887> invalid field value

Jul 21 01:27:02 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 21 01:27:02 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 21 11:56:18 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 21 11:56:18 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 21 12:11:26 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 21 12:11:26 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 21 12:22:34 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 21 12:22:34 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 21 12:39:09 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 21 12:39:09 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 21 12:44:07 Marco-Solito kernel[0]: CoreStorage: fsck has finished successfully for lvg "D0DA78E7-2907-413D-B00E-4C0872442336"

Jul 21 14:55:09 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 21 14:55:09 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 21 14:55:09 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "D0DA78E7-2907-413D-B00E-4C0872442336"

Jul 22 01:09:55 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 22 01:09:55 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 22 01:09:55 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "D0DA78E7-2907-413D-B00E-4C0872442336"

Jul 22 01:12:46 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 22 01:12:46 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 22 01:12:46 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "D0DA78E7-2907-413D-B00E-4C0872442336"

Jul 22 01:28:35 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 22 01:28:35 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 22 01:28:35 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "D0DA78E7-2907-413D-B00E-4C0872442336"

Jul 22 04:52:18 Marco-Solito kernel[0]: CoreStorage: background_transform: exiting with 0

Jul 22 18:40:14 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 22 18:40:14 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 25 04:12:24 Marco-Solito kernel[0]: CoreStorageFsck: LVG on disk2s3 was repaired

Jul 25 04:12:24 Marco-Solito kernel[0]: CoreStorageFsck: <Bootstrap TXG#4486@807 : Live Segments : verify_seghdr : verify_blkhdr> invalid field value

Jul 25 04:12:24 Marco-Solito kernel[0]: CoreStorageFsck: <Bootstrap TXG#4486@807 : Live Segments : kill chkpoint txg @814> invalid field value

Jul 25 04:12:24 Marco-Solito kernel[0]: CoreStorage: fsck has finished successfully for lvg "D0DA78E7-2907-413D-B00E-4C0872442336"

Jul 25 12:49:59 localhost kernel[0]: CoreStorageFsck: LVG on disk0s2 was repaired

Jul 25 12:49:59 localhost kernel[0]: CoreStorageFsck: <Bootstrap TXG#885@523 : Live Segments : verify_seghdr : verify_blkhdr> invalid field value

Jul 25 12:49:59 localhost kernel[0]: CoreStorageFsck: <Bootstrap TXG#885@523 : Live Segments : kill chkpoint txg @560> invalid field value

Jul 25 12:49:59 localhost kernel[0]: CoreStorage: fsck has finished successfully for lvg "4381AA52-6F2F-404B-8661-8E299B508EA5"

Jul 25 12:49:59 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleIntelPchS eriesAHCI/PRT0@0/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOB lockStorageDriver/ST9500420ASG Media/IOGUIDPartitionScheme/Macintosh HD@2/CoreStoragePhysical/CoreStorageGroup/Macintosh HD@s0

Jul 25 19:30:32 Marco-Solito kernel[0]: CoreStorage: fsck has finished successfully for lvg "D0DA78E7-2907-413D-B00E-4C0872442336"

I was able to resolve my problem with a workaround. I had originally upgraded from Snow Leopard with FileVault enabled. When I started seeing problems, I suspected that the versions of FileVault were conflicting. After several reboots, I was able to convince recovery mode to format the drive. It wouldn't let me touch the encrypted volume, but repartitioning the drive cleared it. A reinstall by the recovery partition, followed by a manual transfer of my data, allowed FileVault to finish encrypting successfully. Not an ideal workaround, but a quick fix. And so far, so good.

On a related note, I've been contacted about my posting, so it sounds like Apple is working on this issue. :-)

exactly the same issue by my macbook pro

Seriously, Filevault 2 was the major feedger to upgrading to Lion.

how can we fix it?

Just to inform: I had a 45 min phone call with an Apple engineer the other day, collecting MBs of data of my machine and sending it to him. He seemed to be very interested to the fact that, when booting, my Mac was asking my password before actually booting (which is the normal behavior when FileVault2 is ON). Nothing I can really say in addition to that. They are working on it, and I have no fix to propose unfortunately.