is my RAID safe?

is my RAID safe?

[M Benz]

Today I found this that at my /var/log/message (kernel 2.6.10):

Dec 26 21:35:14 s1 kernel: ata5: status=0x51 { DriveReady SeekComplete 
Error }
Dec 26 21:35:14 s1 kernel: ata5: error=0x84 { DriveStatusError BadCRC }

ata5 is md raid1 with ata6, both are sata drives connected to a promise 
SATA controller.

at /proc/mdstat, the raid 1 is still active with "[UU]"

Is my raid 1 safe and should I replace the "ata5" drive? Also, why the 
raid-1 still up with status "[UU]" ?

Thanks

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Re: is my RAID safe?

[Alan Cox]

On Sul, 2004-12-26 at 14:30, M Benz wrote:
> Today I found this that at my /var/log/message (kernel 2.6.10):
> 
> Dec 26 21:35:14 s1 kernel: ata5: status=0x51 { DriveReady SeekComplete 
> Error }
> Dec 26 21:35:14 s1 kernel: ata5: error=0x84 { DriveStatusError BadCRC }
> 
> ata5 is md raid1 with ata6, both are sata drives connected to a promise 
> SATA controller.

BadCRC is usually cable noise. The kernel will retry such an event
several times, then fall back to PIO and try that before it gives up.

Re: is my RAID safe?

[Bartlomiej Zolnierkiewicz]

On Sun, 26 Dec 2004 17:02:04 +0000, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> On Sul, 2004-12-26 at 14:30, M Benz wrote:
> > Today I found this that at my /var/log/message (kernel 2.6.10):
> >
> > Dec 26 21:35:14 s1 kernel: ata5: status=0x51 { DriveReady SeekComplete
> > Error }
> > Dec 26 21:35:14 s1 kernel: ata5: error=0x84 { DriveStatusError BadCRC }
> >
> > ata5 is md raid1 with ata6, both are sata drives connected to a promise
> > SATA controller.
> 
> BadCRC is usually cable noise. The kernel will retry such an event
> several times, then fall back to PIO and try that before it gives up.

Are you sure?  This is Promise SATA driver not IDE one.

Re: is my RAID safe?

[Norbert van Nobelen]

On Sunday 26 December 2004 18:02, you wrote:
> On Sul, 2004-12-26 at 14:30, M Benz wrote:
> > Today I found this that at my /var/log/message (kernel 2.6.10):
> >
> > Dec 26 21:35:14 s1 kernel: ata5: status=0x51 { DriveReady SeekComplete
> > Error }
> > Dec 26 21:35:14 s1 kernel: ata5: error=0x84 { DriveStatusError BadCRC }
> >
> > ata5 is md raid1 with ata6, both are sata drives connected to a promise
> > SATA controller.
>
> BadCRC is usually cable noise. The kernel will retry such an event
> several times, then fall back to PIO and try that before it gives up.

In other words: The data to disk and from disk is consistent, so the data is 
safe.

>
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