Re: Linux 2.6.3-rc3 - IDE DMA errors on Thinkpad A30
From: Chip Salzenberg
Date: Sun Feb 15 2004 - 23:09:35 EST
According to Jeff Garzik:
> Other equally smart people argue that modern IDE disks reserve space for
> remapping bad sectors. If you run out of sectors that the drive is
> willing to silently remap for you, you should toss the disk and buy a
> new one.
OK, I get the theory. But AFAICT this drive hasn't remapped *any*
sectors. Yet. (Which would not be impossible; it's a relatively
new drive, a few months old at most.) Quoting smartctl:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
5 Reallocated_Sector_Ct 0x0033 100 100 050 Pre-fail Always - 0
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 100 100 000 Old_age Always - 3
198 Offline_Uncorrectable 0x0030 100 100 000 Old_age Offline - 0
This seems to suggest that there are three *candidate* sectors with
reallocation pending, none of which have actually been remapped (yet).
If so, drive replacement would perhaps be premature.
I suppose it's time to read up on the details of the SMART spec.
Chip Salzenberg - a.k.a. - <chip@xxxxxxxxx>
"I wanted to play hopscotch with the impenetrable mystery of existence,
but he stepped in a wormhole and had to go in early." // MST3K
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