I just upgraded my parity drive and kicked off a parity rebuild.  I've gotten 3 UDMA warnings  on drives in the array (first time seeing these ever).  Will this error corrupt the data on the parity drive?  Diagnostics attached.

 

Thanks in advance.

mediatower-diagnostics-20240728-1051.zip

In general, won't.

In general?  Could you be more specific?

6 hours ago, bwnautilus said:

Will this error corrupt the data on the parity drive?

A UDMA CRC error is a problem with the transfer of data between host and disk.  It often comes down to poor or loose disk cables.  If the system detects a transfer problem it retries sending the data which often works just fine.  UDMA CRC errors become a concern when they grow rapidly in quantity or occur frequently on the same disk.

 

Usually, the first thing to check is the cabling to the disk.  Is it a secure connection?  Does swapping out the SATA/SAS cable eliminate the errors?

 

I once "replaced" a disk that accumulated 1109 UDMA CRC errors very rapidly.  I say replaced in quote marks because I rebuilt the disk back onto itself.  It was not a new disk.  The UDMA CRC errors disappeared on that disk and have not returned.  It may have just been the act of removing the disk from the hot-swap cage and reinserting it that fixed the problem as there could have been a bad connection.  I rebuilt it just to be safe.

 

UDMA CRC errors can technically result in data corruption if multiple data resend tries do not fix the issue, but, that is rare.

Edited July 28, 20241 yr by Hoopster

17 minutes ago, Hoopster said:

A UDMA CRC error is a problem with the transfer of data between host and disk.  It often comes down to poor or loose disk cables.  If the system detects a transfer problem it retries sending the data which often works just fine.  UDMA CRC errors become a concern when they grow rapidly in quantity or occur frequently on the same disk.

 

Usually, the first thing to check is the cabling to the disk.  Is it a secure connection?  Does swapping out the SATA/SAS cable eliminate the errors?

 

I once "replaced" a disk that accumulated 1109 UDMA CRC errors very rapidly.  I say replaced in quote marks because I rebuilt the disk back onto itself.  I was not a new disk.  The UDMA CRC errors disappeared on that disk and have not returned.  It may have just been the act of removed the disk from the hot-swap cage and reinserting it that fixed the problem as there could have been a bad connection.  I rebuilt it just to be safe.

 

UDMA CRC errors can technically result in data corruption if multiple data resend tries do not fix the issue, but, that is rare.

@Hoopsterthank you for that explanation.  I may have bumped the SAS/SATA cable from the HBA while reseating the new parity drive.  No further errors so far.  Fingers crossed.