From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Matthew Wilcox <matthew@wil.cx>
Cc: Vinay Venkataraghavan <raghavanvinay@yahoo.com>,
linux-scsi@vger.kernel.org
Subject: Re: Number of devices that SCSI can support
Date: Wed, 09 Jan 2008 09:05:52 -0600 [thread overview]
Message-ID: <1199891152.3493.6.camel@localhost.localdomain> (raw)
In-Reply-To: <20080109022233.GM16309@parisc-linux.org>
On Tue, 2008-01-08 at 19:22 -0700, Matthew Wilcox wrote:
> On Tue, Jan 08, 2008 at 04:55:46PM -0800, Vinay Venkataraghavan wrote:
> > Is there a limit on the number of devices that SCSI supports. In other words, I have a QLogic HBA card, and I am connecting to a SAN which has 64 targets.
>
> I've personally had over five hundred LUNs. You shouldn't be hitting a
> limit here.
I believe the largest test that's been run was the old OSDL CGL
workgroup ... they went up to 4096.
However, LUN support depends on the driver and HBA parameters as well
(some choose to have arbitrary limits).
So, firstly, if the inquiry strings appear (as in you see a scsiX:X:X:64
and above in dmesg) then I'd look at udev issues. If the inquiry
strings don't appear, it's probably a device or driver programmed limit.
James
next prev parent reply other threads:[~2008-01-09 15:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-09 0:55 Number of devices that SCSI can support Vinay Venkataraghavan
2008-01-09 2:22 ` Matthew Wilcox
2008-01-09 12:42 ` Jansen, Frank
2008-01-09 15:05 ` James Bottomley [this message]
2008-01-09 15:36 ` Matthew Wilcox
2008-01-09 15:49 ` Andrew Vasquez
-- strict thread matches above, loose matches on Subject: below --
2008-01-09 22:31 Vinay Venkataraghavan
2008-01-10 14:18 Ellison, Bob
2008-01-10 15:15 ` berthiaume_wayne
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