[SLE] LVM devices, LUNs, and several questions

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Date: Tue, 21 Jun 2005 10:03:36 -0700
To: suse-linux-e@suse.com, suse-sles-e@suse.com

I currently have six systems that all have SAN LUNS mounted as
/dev/sdL#. The LUNS are also visible in /dev/scsi as some format I
can't completely figure out. The /dev/scsi is:
sgh1-0c0i3l9
sgh4-2c0i0l0
I believe the sgh# is the controller on the system while the l# is the
LUN as presented from the SAN device.

1. What's all the stuff in between?
2. I seem to be using a qla2300 driver. Does this drive provide the
ability to do failover, or is that a function of the OS?
3. If I have the need to unmount system1:/dev/sda1 and mount it on
system2, what will /dev/sda1 be mapped as on system2?
4. Would it better to have the devices in a LVM, would #3 be easier to
accomplish?
5. With LVM is there a way to control which system has access to the
LVM at any given time? (In SGI XLV, there is a "nodename" definition
for each XLV. I see a "System ID" in the vgdisplay, does this "System
ID" correspond to the "nodename" concept in XLV?
6. Where is an excellent starting guide for LVM?
(http://www.tldp.org/HOWTO/LVM-HOWTO/index.html ?)

Thanks
eric

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• Previous message: Carl William Spitzer IV: "Re: [SLE] 9.3 here I come :)"
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