[THIN] Re: booting to san?
- From: "Dave Mishchenko" <Dave.Mishchenko@xxxxxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Wed, 29 Mar 2006 15:05:17 -0800
The 8843 model blades will support 2 SCSI drives plus the fibre channel
daughter card - no expansion cabinet needed as the drives themselves are
pretty small. The older 8876 models (at least the ones I have) don't
support that configuration.
________________________________
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Landin, Mark
Sent: Wednesday, March 29, 2006 3:01 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: booting to san?
Tell me more about having two internal drives plus an HBA in the HS20.
How do you do that? Expansion cabinet?
________________________________
From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Taylor, George
Sent: Wednesday, March 29, 2006 4:49 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: booting to san?
I have a very similar setup as Jo does, HS-20s booting from an
IBM FastT SAN. Until just recently the only drives available on the
HS-20 in it's stock configuration was IDE, basically the equivilent of a
laptop drive. Although you could mirror them, the redundancy and
performance is just not there. The drives are obviously not hot
swappable, so if one fails you bring down the server to replace it. By
booting from SAN we have highly configurable space, redundancy, hot
swappable drives, etc..
One recommendation is to never have an OS swap file on your SAN,
so thats a downfall, we put the swap file on the local drive and of
course if it fails your server is going to crash. We tested putting it
on the SAN and watching port performance on the McData switches, there
was noticable traffic there, but nothing really large. We still opted
to leave the swap file local though, we just don't want upwards of 100
OS swap files on the SAN.
IBM has done much better now, before you had to lose one of the
internal drives in order to have an HBA, now you can have 2 SCSI drives
internal as well as an HBA, so booting from the SAN isn't as appealing.
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