Resume from hibernation fails with pata_it821x RAID volume
Quoted 6 lines · On Friday 06 February 2009 18:56:35 Alan Cox wrote:
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-0+ memset(&id[ATA_ID_SERNO], 0x20, ATA_ID_SERNO_LEN);Why not ' '?
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MBR, Sergei
Digging into the docs the RAID serial number (and what that means isn't defined anywhere I can see) is byte offset 54-73 in each of the 4 128 byte blocks returned by the chip status query we do at boot (
it821x_probe_firmware).
Yes, found it there. But it seems to be the same number as present in the IDENTIFY data. It contains date and time of boot (matches RAID_SERIAL_NUMBER structure found in iteraid.h in driver source from ITE) instead of date and time of RAID creation.
I don't have any better solution than the patch below. Generating the serial number from drives containing the array is not an option as it prevents resume if one of the drives fails.
Fix resume on pata_it821x RAID volume by clearing the serial number in IDENTIFY data. The serial number is different on each boot, breaking validation on resume from hibernation.
drivers/ata/pata_it821x.c +3 -0
@@ -561,6 +561,9 @@ id[83 ] |=0x4400 ;/* Word 83 is valid and LBA48 */ id[86 ] |=0x0400 ;/* LBA48 on */ id[ATA_ID_MAJOR_VER ] |=0x1F ; +/* Clear the serial number because it's different each boot +which breaks validation on resume */ +memset (&id[ATA_ID_SERNO ],' ' ,ATA_ID_SERNO_LEN ); }return err_mask; }
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Ondrej Zary