Comments on: Dell MD3000 – Great DAS DB Storage

By: edison

edison — Sat, 01 Aug 2009 01:11:10 +0000

i've been trying to track down the problem with these md3000 units. i can't seem to get any amount of decent iop/s using the same hardware you listed…

hopefully this blog gets read again eventually and i can turn to somebody for some assistance, since dell is completely and utterly useless.

By: Weiyi Yang

Weiyi Yang — Tue, 07 Jul 2009 20:40:27 +0000

I have a Dell PowerEdge 1850 with a Perc 5/e + MD 1000 and a SAS 5/e + MD 3000. It runs Solaris 10 (8/07) with the latest patch cluster (Solaris 10 x86 Recommended Patch Cluster DATE: Jun/26/09). I was using hardware raid-5 on the MD1000 (14×500G SATA + 1 hotspare). With 70% read, 70% random, 8k block, 16 threads, I was able to get 3384KB/s, 423 IOP/s. With hardware raid6 on the MD3000 (14×1T SATA + 1 hotspare), I could get 1243KB/s, 155IOP/s. With raidz2 (14×1T drives exposed as raid0 virtual disk + 1 hotspare), I could get 1590KB/s, 199IOP/s.

Awfully slow it appears. Could it be a kernel problem?

By: Krypto77

Krypto77 — Tue, 30 Dec 2008 08:33:54 +0000

We recently got a new MD3000 with 3 1TB HD. Dell said we can purcahse non Dell HD. Has anyone done this? If so, did ti work? How did you get it to work? Any help would be greak

By: Dave

Dave — Mon, 22 Dec 2008 03:40:09 +0000

Significant Upgrade Now Available for the MD3000 and MD3000i – Generation 2

Please see:

http://en.community.dell.com/forums/p/19247968/19...

By: Rhafyuhp

Rhafyuhp — Wed, 03 Dec 2008 20:29:11 +0000

nice site,

By: Rdnkrqwh

Rdnkrqwh — Wed, 03 Dec 2008 02:24:35 +0000

Nice day,

By: Zixxiruz

Zixxiruz — Tue, 02 Dec 2008 23:12:46 +0000

Nice day,

By: Scott Ehrlich

Scott Ehrlich — Tue, 18 Nov 2008 10:49:22 +0000

I purchased an MD3000i, purchased the snapshot premium feature, using the MD Storage Manager partitioned space in a raid set for snapshots and assigned said space for snapshots. Now, of all Dell’s documentation I have, nothing tells me how to actually configure the allocated snapshot space to take snapshots of any of the RAIDs I created (happen to be two x RAID 5), schedule snapshots, or anything else.

How do I fully manage snapshots beyond allocating space for them? I happen to be using CentOS 5.2 (same as RHEL 5.2).

Thanks.

By: Craig Smith

Craig Smith — Mon, 17 Nov 2008 23:55:32 +0000

All,

I am wondering if anyone has successfully got this to play with (OPEN)Solaris?

I am struggling to get more than one LUN to be usable in OpenSolaris. I am able to see the target, and after I call the command “devfsadm -i iscsi” and then “format” I can see all the disks (they even show as coming from a md3000i). When I try to select any drive after the initial LUN I get a disk can not be opened error and am unable to label or format the iscsi drive.

Am I banging my head on the wall for no reason with this?

By: tech

tech — Tue, 14 Oct 2008 22:42:54 +0000

Acclaim PC services:

you are correct about the dell markup on drives/caddies, however, ive found you CAN use SOME ‘non-supported’ sata and sas disks. off the shelf WD5000YS works with the proper sata interposer board.

gripes: ‘cli’ should be via ssh. also important commands from cli not included in gui… why?