> [420781.333189] ata6.00: cmd b0/d8:00:00:4f:c2/00:00:00:00:00/00 tag 0
> ^^ ^^(b0/d8)^^ ^^(4f:c2)
> [420781.333190] res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4
> (timeout) ^^ 40:00:ff
> [420781.333194] ata6.00: status: { DRDY }
They are the send and received task file (command blocks) for the failed
command.
> [420781.333200] ata6: hard resetting link
> [420781.638589] ata6: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> [420781.662166] ata6.00: configured for UDMA/133
> [420781.662166] ata6: EH complete
>
> (at the time there was little to no I/O occuring on this block device, but
> disks on the raid5 volume were being accessed at the time, so there was
> system activity, mainly disk reads 300-500KiB/s over ethernet)
>
> Nick's(?) problem:
>
> > Nick
> >
> > ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
> > ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
> ^^ ^^ (ea/00) vs. (b0/d8) - mind are always the same (FYI)
> > res 40/00:00:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
> ^^ ^^ (40:00: but no ff)
>
> The rest of the messages are the same. Is there any correlation
> that can be made here? When this happens to others, is it
> always the same codes as shown above or do they change? If they
> do not change, how come they vary between users who have this
> problem?
>
> > ata1.00: status: { DRDY }
> > ata1: soft resetting link
> > ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> > ata1.00: configured for UDMA/133
> > ata1: EH complete
> > sd 1:0:0:0: [sda] 2930277168 512-byte hardware sectors (1500302 MB)
> > sd 1:0:0:0: [sda] Write Protect is off
> > sd 1:0:0:0: [sda] Mode Sense: 00 3a 00 00
> > sd 1:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't
> > support DPO or FUA
>
> Can anything be said about these errors, can we classify them into groups?
> Or are they just random? It does not appear to happen more or less with
> one filesystem or another either, one guy is using ext3, I am using XFS--
> certainly something much deeper..
>
> Justin.
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