Re: Serial ATA (SATA) for Linux status report

[Jeff Garzik]

Kevin P. Fleming wrote:
> Jeff Garzik wrote:
>
> > Yes, a tested patch would be great, thanks!
>
> (hijacking this subthread, sorry)
>
> Jeff, you mentioned in the status report "don't remove an operating disk 
> from an ICH5, hotplug is not supported".
>
> Does this mean hardware damage, or just serious libata/ICH5 confusion? 
> I've got a six-disk server here with two disks on an ICH5 and four on an 
> SATA150 TX4, and I really would like to be able to hot-replace a disk in 
> case of a failure. If the ICH5 cannort support this, I'm going to have 
> to get a 3ware card.


_Probably_ no hardware damage, but I do not know for sure.  I do not it 
will likely lockup, and data corruption is also a possibility.

As I mentioned in another email, ICH5 hardware does not support hot 
removal.  HOWEVER.  If the OS driver is given sufficient notice, it can 
shut down the port, and the sysadmin may then unplug the SATA cable.

As a tangent, your TX4 hardware fully supports hotplug, but libata does 
not yet support it.

	Jeff



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