lkml.org 
[lkml]   [2007]   [Jul]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [dm-devel] Re: [RFD] BIO_RW_BARRIER - what it means for devices, filesystems, and dm/md.
From
Date
On Tue, 10 Jul 2007 14:39:41 EDT, Ric Wheeler said:

> All of the high end arrays have non-volatile cache (read, on power loss, it is a
> promise that it will get all of your data out to permanent storage). You don't
> need to ask this kind of array to drain the cache. In fact, it might just ignore
> you if you send it that kind of request ;-)

OK, I'll bite - how does the kernel know whether the other end of that
fiberchannel cable is attached to a DMX-3 or to some no-name product that
may not have the same assurances? Is there a "I'm a high-end array" bit
in the sense data that I'm unaware of?

[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2007-07-11 01:43    [W:0.160 / U:0.352 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site