From: Matthias Schulz <schulz@unix-services.de> Date: Fri, 15 Feb 2002 19:58:50 +0100 Message-Id: <0202151958500G.10009@frontend> Subject: Re: [suse-sparc] Question: Fibre Optic Interface and Storage Array - more information
Hi group,
thanks to Lou for posting my article to the group.
In the meantime I gathered some more information :
- you can use 'hwinfo' to see all the SCSI-devices, that the
pluto-driver sets um in SuSE 7.3
- you might wanna check
http://sunsolve.sun.com/handbook_pub/Devices/Devices_TOC.html
for your SUN-devices in your SPARC-compatible box.
It's : http://sunsolve.sun.com/handbook_pub/Devices/Fibre_Channel
for the SUN Fibre_Channel adapters and the SSA-100 box.
As far as I found out, the slots in the box are treated the
following way (ATTENTION : this is from Solaris. I loaded vxvm
which is still on my system, but the license will expire on
02/17/2002) :
Each tray is separated into two 'targets' :
Below are the namings for /dev/rdsk/c..... in solaris, where
'cn' = controller number
'tn' = target number
'dn' = disk number
1st disk ist the one in the slot nearest to the backplane. 10th
disk in the one most to the front of the tray.
1st tray is the leftmost tray.
1st tray , 1st disk : /dev/rdsk/c1t0d0
1st tray, 2nd disk : /dev/rdsk/c1t0d1
1st tray, 5th disk : /dev/rdsk/c1t0d4
1st tray, 6th disk : /dev/rdsk/c1t1d0 <-- change of 'tn' here
1st tray, 10th disk : /dev/rdsk/c1t1d4
2nd tray, 1st disk : /dev/dsk/c1t2d0 <-- change of 'tn' here
2nd tray, 2nd disk : /dev/rdsk/c1t2d1
2nd tray, 6th disk : /dev/rdsk/c1t3d0 <-- change of 'tn' here
.... and so on.
This means, each tray is separated into two 'targets' of wich each
consists of 5 disks (disk0 - disk4)
Target 0 and 1 -> 1st tray
Target 2 and 3 -> 2nd tray (middle)
Target 4 and 5 -> 3rd (rightmost) tray.
I think, this should help to use the 'raidtools' and 'lvm' under
linux to do whatever you like with the array.
One of my ideas to use this array is :
Every installed system on my site (except firewall) will have it's
own mirrored system disk in the array. A size of 4 gb per disk
should be sufficient for either linux / solaris / even windows (my
personal 'game-boy'). Any other information (like programs, data,
often needed cd-images) is put on the server with a couple of big
logical volumes. Data will be mirrored or raid'ed.
Since I do not have THAT much systems on my site here (about 10),
it should be possible to enable alle the machines to net-boot their
OS within a reasonable amount of time. I might consider a swap-disk
(1 gb should be enough) locally in every machine. I guess even
heavily used gaming cd's are possible, since this box has a
theoretical maximum of 25 MB/s (MegaBYTES) transfer-rate. Together
with a switched 100MBit Ethernet, this should give me sufficient
performance to access my storage.
What do YOU sys-admins think about that ? Are there any caveats in
this idea ?
Thanks for reading
Matthias Schulz
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unix-services
Matthias Schulz
Lange Straße 44
70794 Filderstadt
Tel: 07000 -17 17 17 17
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