Re: aic7xxx support for >2TB volumes?

[Brian King <brking@us.ibm.com>]

Kilian CAVALOTTI wrote:
> On Monday 21 November 2005 15:48, Brian King wrote:
> 
>>Quite possibly. Looking at ahc_linux_run_command in aic7xxx_osm.c it
>>appears that commands with a cdb length of > 12 are sent to the adapter in
>>a different way. 
> 
> 
> Do you mean: ?
>         hscb->cdb_len = cmd->cmd_len;
>         if (hscb->cdb_len <= 12) {
>                 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
>         } else {
>                 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
>                 scb->flags |= SCB_CDB32_PTR;
>         }

Yes.

>>Perhaps this method does not work on the card you have. 
> 
> 
> Isn't there a way to determine if the HBA has an hardware limitation, or the 
> size of the max command length it accepts?

I've never seen a hardware spec for these adapters, so I can't really comment.
Hopefully someone else on the list can help on this one...


-- 
Brian King
eServer Storage I/O
IBM Linux Technology Center