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My ipod Classic 160 GB stops syncing after 30 something GBs

I have over 120 GB of music in my itunes. I have tried everything: Syncing entire music library, syncing half of it, then syncing in batches of 10GB. I always have the same problem at around 32 or 33 GBs it gives me an error message sayin smething like: cannot sync song "Whatever" error (50).


I have restored ipod many times, formatted it through windows used different usb ports, read every post on this and other sites. It is always the same it won't sync more than 30something GBs!!!


HEEEELP!!!!

iPod classic, Windows 7

Posted on Jul 26, 2012 4:25 PM

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Question marked as Best reply

Posted on Jul 27, 2012 2:23 AM

Check your iPod with Diagnostics Mode

It's possible that your iPod's hard drive has started to fail. Take your iPod and place your right thumb on the centre SELECT button and your left on the top MENU button. Press down both thumbs for about 6 seconds until your iPod reboots. Immediately move your left thumb around to the rewind button |<< on the left and hold this down together with SELECT for a further 6 seconds. Your iPod should now switch into Diagnostic Boot mode. Press MENU for Manual Test, then select IO > HardDrive > HDSMARTData to reveal your stats. For comparison here are mine taken when my 6th Generation Classic was about 2 years old:

Retracts: 889
Reallocs: 12
Pending Sectors: 0
PowerOn Hours: 2202
Start/Stops: 894
Temp: Current 24c
Temp: Min 10c
Temp: Max 50c

Take a note of your results. When finished press SELECT & MENU for 6 seconds to reset the iPod again.


With modern disc drives sectors are no longer marked bad by a disc scan, if the SMART firmware detects a sector it has trouble accessing it will attempt to invisibly reallocate it to a spare area of the disc.


Note that I've only 12 remapped sectors and none pending. To help explain what the numbers mean here is an extract from the Wikipedia S.M.A.R.T. article:

Reallocated Sectors Count
Count of reallocated sectors. When the hard drive finds a read/write/verification error, it marks this sector as "reallocated" and transfers data to a special reserved area (spare area). This process is also known as remapping, and "reallocated" sectors are called remaps. This is why, on modern hard disks, "bad blocks" cannot be found while testing the surface – all bad blocks are hidden in reallocated sectors. However, as the number of reallocated sectors increases, the read/write speed tends to decrease. The raw value normally represents a count of the number of bad sectors that have been found and remapped. Thus, the higher the attribute value, the more sectors the drive has had to reallocate.


Pending sector count
Number of "unstable" sectors (waiting to be remapped, because of read errors). If an unstable sector is subsequently written or read successfully, this value is decreased and the sector is not remapped. Read errors on a sector will not remap the sector (since it might be readable later); instead, the drive firmware remembers that the sector needs to be remapped, and remaps it the next time it's written.

Large numbers of Reallocs or Pending Sectors would suggest your drive is failing and that you may need to repair or replace your iPod. Check your stats after another attempt to update your iPod. If the numbers increase that again points to hard drive failure. While it won't be good news at least you'll know it isn't some random software problem and you can decide what to do next.


tt2

132 replies

Sep 29, 2012 10:27 PM in response to turingtest2

I seee...many thanks for the suggestions, tt2 🙂


Actually, before I had this classic, I already had iPod video 80gb, it had the same case with this classic, but unfortunately, it already crashed, when I touch the select button, the appearance are a picture of iPod, an exclamation mark, and apple's web support address for iPod (www.apple.com/support/ipod.


Do you have any idea or solution for this case?

Nov 23, 2012 1:56 PM in response to HollieSnooz

Can't see much hope for any of these recent sets of stats, but it might be worth one lost shot using DFU restore


Connect the classic to your computer with iTunes running then press and hold down Menu & Select like a normal reset but keep holding for 12 seconds. The iPod should reset as normal and then the screen should go black. iTunes should detect the device in recovery mode and offer to restore.


If you can't get any media onto the device using the staged transfer method posted earlier in this thread then call it a day. 😟


tt2

Mar 14, 2013 12:04 PM in response to nickywire

hello, can someone please help? I recently bought an ipod in a pawn shop and tried syncing. I got about 1 gb worth of songs on before I started getting errors. I tried the methods above and got these numbers...

Retracts: 31

Reallocs: 312

Pending Sectors: 896

PowerOn Hours: 104

Start/Stops: 17811

Temp: Current 31C

Temp: Min 6C

Temp: Max 60C


they gave me a used usb cord too, I am worried that may be part of the problem. Please help! Thanks.

Mar 15, 2013 4:05 AM in response to perudave1

The pending sectors are the ones that can't be read properly. When the iPod tries to play a song that comes from such a region what typically happens is that the song stalls for a few seconds and then the iPod skips to the next song. When you're tying to put content on to the device the process will fail if any folder or part of the library database gets stored in a problem sector. Media is written out and then won't be read again until played, but folders and the database need to read back as more content is added. Depending on how localised the damage is it may be possible to detect and map out all the pending sectors as reallocated over a number of attempts to reformat the drive. Often however all this reveals is new areas that cannot be read back reliably.


A few hundred reallocs is OK as long as none are pending and the drive can be fully loaded. Min temp is not supposed to go below 0C. Not really sure how to interpret the other numbers offhand.


tt2

Mar 18, 2013 3:08 PM in response to turingtest2

Hi tt2, hope you can help with my issues


I have too been having problems with my iPod classic 160GB, namely:

-Freezing on songs, and then skipping to the next one

-Freezing when syncing, reaching a random number of synced songs and then completely stopping


My SMART DATA statistics are as follows:

Retracts: 9

Reallocs: 5880

Pending Sectors: 160

PowerOn Hours: 33

Starts / Stops: 3223

Temp: Current 33C
Temp: Min 13C

Temp: Max 57C


I have been very careful with this iPod, not throwing it around / not dropping it / not generally mistreating it. As I've gathered from your comments high numbers of reallocs and pending sectors are bad, right? If so, should I take this iPod back? It is within it's one years warranty.


I was kinda hoping you'd know a little bit about whether I can use these statistics to show the people in the Apple store that my iPod isn't okay (it's fair to say I'm worried about them just palming my issues off as nothing worth repairing / replacing and the warranty to void 😢)


Thank you for any help you give in advance! 🙂

Mar 18, 2013 4:19 PM in response to JackRoper

The temperature isn't supposed to get above 50C. Getting too warm may stress components leading to problems. Typical causes would be leaving the device in direct sunlight. The stats are certainly not healthy and if it were me and the device were in warranty I would certainly use them to argue for a replacement unless I knew I was directly at fault.


tt2

My ipod Classic 160 GB stops syncing after 30 something GBs

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