Currently Being ModeratedAug 1, 2011 5:09 AM (in response to Nasjo)
Are you saying it is not an HFS Extended (HFS+) disk? HFS standard went out of date back with the release of Mac OS 8.1, and should be avoided unless communicating with older Macs than 8.1's release partly because formatted blocks are larger.
Currently Being ModeratedAug 1, 2011 5:11 AM (in response to Nasjo)
Try running disk utility on the hard drive to repair it, also repair the permissions.
Currently Being ModeratedAug 1, 2011 5:19 AM (in response to a brody)
no, it's HFS+, and disk utility doesn't see the harddisk either...
Currently Being ModeratedAug 1, 2011 5:23 AM (in response to Nasjo)
Do you have some more details about the type of drive that you are having problems with? WD seems to make quite a few different models under the "WD Elements" product name.
My feeling at the moment is that it isn't a driver issue, not least because you typically don't have to install drivers yourself in order to access external hard drives. I have a late 2009 iMac upgraded to Lion that is connected to a variety of hard drives both by USB and FireWire, and from different manufacturers (Seagate, LaCie and Iomega) but all seem to be quite happy mounting in 10.7.
By any chance do you have anything else that you can plug into your iMac to see if it mounts correctly, such as another hard drive or even a USB memory stick? If so, do you have any problems with that?
Currently Being ModeratedAug 1, 2011 5:37 AM (in response to Marcus Peaston)
it's a WD elements desktop 1,5 TB external harddisk (so no network or multimedia drive). I bought the Imac a month ago, and immediately formatted the external HD to HFS+, everything worked just fine. After I installed osx 10.7, the trouble started.
I've tried another external HD (which is in ntfs format), and it was immediately recognised and appeared on the desktop. Also, memory sticks are no problem.
When i connect the disk to a different computer (a windows pc), it is recognised...
Currently Being ModeratedAug 1, 2011 5:52 AM (in response to Nasjo)
Given all that you have to figure that this is a bug in Mac OS 10.7 - it certainly does not sound as though there is a fault with the drive or with your iMac. At this moment I think you ought to wait for 10.7.1 to be released (which ought to be soon) and see if that fixes the problem.
Currently Being ModeratedAug 1, 2011 6:19 AM (in response to Marcus Peaston)
Unlikely that it will. The problem with many hard drives, and this was very apparent with Mac OS X 10.3 many eons ago, is that their firmware does not match what Apple understands to be the industry standard. Apple rarely if ever downgrades its own industry standard spec with an upgrade. Contact Western Digital and ask them if they have heard of other issues with the same drive on Lion. With 10.3 it became obvious that most vendors they need to upgrade their firmware to continue to be compatible with the updated operating system. If not, you may want to use a data recovery tool to see if you can access your data*:An Apple user since 1981, Mac OS X (10.7), - * Links to my pages may give me compensation.
Currently Being ModeratedAug 1, 2011 6:24 AM (in response to a brody)
wow...does that mean i cant use my external hd with my imac ever??
Currently Being ModeratedAug 1, 2011 6:26 AM (in response to Nasjo)
No it just means some models are antiquated, and need to be updated in their firmware.
Currently Being ModeratedAug 1, 2011 6:31 AM (in response to a brody)
ok, but how do you update the firmware, if the HD can't be accessed?
Currently Being ModeratedAug 1, 2011 6:38 AM (in response to Nasjo)
Its access may only be obvious once you get the firmware installer. Once you do, then it will become visible again. If it isn't then there is an issue with the hard drive itself.
Currently Being ModeratedAug 9, 2011 11:09 AM (in response to a brody)
I have an external Lacie disk now that was not mounting with Lion. now I went back to Leopard and my mac still does not recognize the disk nor mount it.... I plugged the same disk on a mac book pro with Leopard that was never "contaminated" by Lion and the disk shows up no problem. any help out there? thank you
Currently Being ModeratedAug 14, 2011 2:01 AM (in response to Nasjo)
I have about 20 external hardisks of several brands and different sizes. After installing Lion on some Macs the disks could not be accessed. Some however had no problem at all. Among this harddisk were 3 new ones bought in the last month (the last 2 yesterday).
I have learned all disks mounted without any problem when formatted FAT32 however when the were formatted NTFS, they did not mount at all.
Using Paragon did not help with Lion even the newest version did not resolve the problem so my guess is we have to wait till Seagate cs will make new firmware, Paragon will make an update or format your harddisk to FAT32 and lose all data or take some days to copy it to another disk.