Re: Re: Re: BUG in kernel: Wrong Handling of USB HDD’s in scsiglue(slave_configure) and scsi/sd(sd_read_cache_type)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, 2011-10-05 at 22:29 +0530, Amit Sahrawat wrote:
> Can anyone suggest what is the way ahead to detect the presence of
> Write Cache in these kind of USB HDD and proceed accordingly by
> assigning proper flushing method.
> Please share some opinions on this.

We're a bit out of ideas.  We've already established that we do exactly
what windows does in this situation, which is usually what we aim for.
Realistically, if the disks lie how do we know when not to believe them?

The best we could probably offer is an interface to turn on the WCE bit
in software (technically, you can do this today
in /scsi/class/scsi_disk/<disk>/cache_type, it's just that it will try
to commit the change as a MODE_SELECT which will presumably fail).

James


--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Device Mapper]
  Powered by Linux