Re: [RFA] reiserfs 3.6 on SSD software RAID1 with TRIM/DISCARD on SMP-system doable?

[NeilBrown <neilb@suse.de>]

[-- Attachment #1: Type: text/plain, Size: 1637 bytes --]

On Thu, 28 Feb 2013 04:29:18 +0100 Dieter Nützel <dieter@nuetzel-hh.de> wrote:

> Hello,
> 
> I'm on ReiserFS 3.6 since the beginning (under S.u.S.E. :-) even with 
> beta stuff.
> Now it is time for SSDs.
> I migrated one UP workstation (openSUSE 12.2 + stable + etc.) and have 
> to switch all other servers + workstations onto SSDs, too.
> 
> Please give me your advice if I better should switch to ext4 or 
> whatever.
> All systems should run your great MD software RAID1 on SSD hopefully 
> with TRIM and/or DISCARD.
> 

Sorry, but I am not in a position to recommend one filesystem over another.
You might get more opinions if you posted somewhere like
linux-raid@vger.kernel.org .

> Thanks,
>     Dieter
> 
> PS @Neil:
> I get /dev/md0 (swap) and poorly /dev/md127 (root).
> But YaST created this /etc/mdadm.conf on the first workstation:
> 
> DEVICE containers partitions
> ARRAY /dev/md0 UUID=bd5xxxxx
> ARRAY /dev/md1 UUID=e74xxxxx
> 
> Ahhh, now I see something (below).
> Can we clean this?

Sorry, but I don't really understand the question.

> 
> Sonja /home/dieter# cat /proc/mdstat
> Personalities : [raid1] [raid0] [raid10] [raid6] [raid5] [raid4]
> md0 : active raid1 sdb1[0] sda1[1]
>        1051584 blocks super 1.0 [2/2] [UU]
>        bitmap: 0/1 pages [0KB], 65536KB chunk
> 
> md127 : active raid1 sdb2[0] sda2[2]
>        30209920 blocks super 1.0 [2/2] [UU]
>        bitmap: 1/1 pages [4KB], 65536KB chunk
> 
> unused devices: <none>
> 
> Should I generate partition tables on the devices or are the raw 
> devices enough?

Either works fine.

NeilBrown

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 828 bytes --]