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Re: [linux-lvm] lvm and fibre channel



Andreas Dilger writes:
 > Florin writes:
 > > We have a big Web project, involving several disk arrays (over 3 TB total
 > > storage space) and around 24 Linux servers.
 > > 
 > > On the disk arrays, we need to create aprox. 2600 partitions, which may be
 > > mounted by the Linux servers (but no server can mount more than 16 partitions
 > > at any given moment).
 > > 
 > > So here is the problem: the Fibre Channel devices are seen as SCSI devices,
 > > but Linux doesn't support more than 2048 partitions on SCSI disks (max 128
 > > disks, max 16 partitions each).
 > > 
 > > Does LVM works over Fibre Channel?
 > 
 > Someone on the list was trying to get LVM to work on FC, but they were
 > having problems.  I don't know if they got it working at the end.
 > 
 > LVM will not help you here either, because it currently limits you to
 > 255 LVs, regardless of how many VGs you have, because there is only 1
 > block major for LVM.

is using devfs an option? We are planing to attach a PC to a storage
array (HP XP256) using LVM and devfs over fibre channel next week and
doing some tests (performance, ease of use, etc....)



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