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From: Richard Scobie <r.scobie@clear.net.nz>
To: Jeff Garzik <jeff@garzik.org>
Cc: Mark Lord <liml@rtr.ca>, linux-ide@vger.kernel.org
Subject: Re: SAS v SATA interface performance
Date: Sun, 02 Dec 2007 12:55:46 +1300	[thread overview]
Message-ID: <4751F482.60204@clear.net.nz> (raw)
In-Reply-To: <4751C6DA.3080409@garzik.org>



Jeff Garzik wrote:
> Mark Lord wrote:
>> SATA port multipliers (think, "hub") permit multiple drives
>> to be active simultaneously.
> 
> Quite true, although the host controller could artificially limit this, 
> giving the user a mistaken impression of their port multiplier being 
> limited to one-command-per-N-drives.

Interesting. I was basing my comments on what may well be a vested 
interest slanted paper - see the sidebar on page 2.

http://www.xtore.com/Downloads/WhitePapers/SAS_SATAValue%20Whitepaper_final.pdf

For the modest extra cost of a non-RAID SAS HBA and JBOD enclosure with 
SATA drives, over a port multiplied setup, there would seem to be some 
advantages.

Or have I been taken in by the hype... :)

Regards,

Richard

  reply	other threads:[~2007-12-01 23:57 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-30 19:19 SAS v SATA interface performance Richard Scobie
2007-11-30 21:24 ` Michael Tokarev
2007-11-30 23:17   ` Alan Cox
2007-12-01  7:43     ` Richard Scobie
2007-12-01 14:37       ` Greg Freemyer
2007-12-01 19:19         ` Richard Scobie
2007-12-01 20:01           ` Mark Lord
2007-12-01 20:40             ` Jeff Garzik
2007-12-01 23:55               ` Richard Scobie [this message]
2007-12-02  3:45                 ` Mark Lord
2007-12-02  3:49                   ` Mark Lord
2007-12-10  7:33   ` Tejun Heo
2007-12-10 14:36     ` Jens Axboe
2007-12-10 16:28       ` Mark Lord
2007-12-10 14:50     ` James Bottomley
2007-12-10 16:32     ` Mark Lord
  -- strict thread matches above, loose matches on Subject: below --
2007-12-01  0:04 Richard Scobie
2007-12-01  0:17 ` Alan Cox
2007-12-01  3:06   ` Mark Lord
2007-12-10  7:15     ` Tejun Heo
2007-12-10 16:23       ` Mark Lord

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