dell poweredge - JBOD with PERC H810

I'm wondering if anybody has ever used Dell storage products like the MD3220 array in a JBOD configuration. From what I can tell only perc h810 will work for external JBOD but that is not terribly specific, and for some reason I couldn't find many examples on the web of people configuring dell storage products as JBOD.

My question is: Is it possible to connect to am MD3220 array, or other Dell arrays using a PERC h810 controller and use it as JBOD, and if so do I have to configure every disk in the array as a RAID 0 volume?

I want to construct a cluster for Hadoop, but I have to use big servers, so I'm trying to to find a way to add a lot of storage to them. The type of servers I have to use is R820 from Dell, and they only have 16 disks in them, and I want to have the possibility to add storage as I grow so arrays seem the logical way to go in this situation. As an underlying file system I think XFS or ext4 will be my pick because from what I read on the Hadoop implementation the JBOD is handled by HDFS.

Answer

The MD3xxx series is designed to do RAID in the storage controller, and connect to a plain HBA card. You can use an MD1xxx shelf, which is JBOD, with a RAID card like the H810 (or with the plain HBA, with something like ZFS). Making a set of separate RAID0 LUNs and presenting to the H810 would probabaly work, but there's little benefit over presenting RAIDed LUNs from the MD3220 to the H810 (and making them RAID0 there, if required to pass them up to the host OS).

The best solution, though, would be to replace one or the other -- drop to a plain HBA in the server, or replace the MD3220 controllers with MD1220 EMMs (they share a common chassis, just different modules).

Comments

linux - iDRAC6 Virtual Media native library cannot be loaded

When attempting to mount Virtual Media on a iDRAC6 IP KVM session I get the following error: I'm using Ubuntu 9.04 and: $ javaws -version Java(TM) Web Start 1.6.0_16 $ uname -a Linux aud22419-linux 2.6.28-15-generic #51-Ubuntu SMP Mon Aug 31 13:39:06 UTC 2009 x86_64 GNU/Linux $ firefox -version Mozilla Firefox 3.0.14, Copyright (c) 1998 - 2009 mozilla.org On Windows + IE it (unsurprisingly) works. I've just gotten off the phone with the Dell tech support and I was told it is known to work on Linux + Firefox, albeit Ubuntu is not supported (by Dell, that is). Has anyone out there managed to mount virtual media in the same scenario?

hp proliant - Smart Array P822 with HBA Mode?

We get an HP DL360 G8 with an Smart Array P822 controller. On that controller will come a HP StorageWorks D2700 . Does anybody know, that it is possible to run the Smart Array P822 in HBA mode? I found only information about the P410i, who can run HBA. If this is not supported, what you think about the LSI 9207-8e controller? Will this fit good in that setup? The Hardware we get is used but all original from HP. The StorageWorks has 25 x 900 GB SAS 10K disks. Because the disks are not new I would like to use only 22 for raid6, and the rest for spare (I need to see if the disk count is optimal or not for zfs). It would be nice if I'm not stick to SAS in future. As OS I would like to install debian stretch with zfs 0.71 as file system and software raid. I have see that hp has an page for debian to. I would like to use hba mode because it is recommend, that zfs know at most as possible about the disk, and I'm independent from the raid controller. For us zfs have many benefits, ...

linux - Awstats - outputting stats for merged Access_logs only producing stats for one server's log

I've been attempting this for two weeks and I've accessed countless number of sites on this issue and it seems there is something I'm not getting here and I'm at a lost. I manged to figure out how to merge logs from two servers together. (Taking care to only merge the matching domains together) The logs from the first server span from 15 Dec 2012 to 8 April 2014 The logs from the second server span from 2 Mar 2014 to 9 April 2014 I was able to successfully merge them using the logresolvemerge.pl script simply enermerating each log and > out_putting_it_to_file Looking at the two logs from each server the format seems exactly the same. The problem I'm having is producing the stats page for the logs. The command I've boiled it down to is /usr/share/awstats/tools/awstats_buildstaticpages.pl -configdir=/home/User/Documents/conf/ -config=example.com awstatsprog=/usr/share/awstats/wwwroot/cgi-bin/awstats.pl dir=/home/User/Documents/parced -month=all -year=all...

Blog

Search This Blog