similar to: SCSI RAID monitoring

From: Joshua Baker-LePain <jlb17 at duke.edu> > I'm in the midst of testing a dual 9500-12 based system, and I've got all > sorts of results (I posted tiobench numbers for XFS and ext3 recently). Until the Escalade 9500S series matures, I've been recommending the following: 3Ware Escalade 7506/8506 for RAID-10. 3Ware Escalade 7506/8506 for RAID-5 when it is largely a

I run a decent amount of 3ware hardware, all under centos-4. There seems to be some sort of fundamental disagreement between ext3 and 3ware's hardware RAID5 mode that trashes write performance. As a representative example, one current setup is 2 9550SX-12 boards in hardware RAID5 mode (256KB stripe size) with a software RAID0 stripe on top (also 256KB chunks). bonnie++ results look

Is anyone using RAID6 in production? In moving from hardware RAID on my dual 3ware 7500-8 based systems to md, I decided I'd like to go with RAID6 (since md is less tolerant of marginal drives than is 3ware). I did some benchmarking and was getting decent speeds with a 128KiB chunksize. So the next step was failure testing. First, I fired off memtest.sh as found at

I hate to bring up the raid card wars again, but... :) It's pretty well established that 3ware is a good "real" hardware raid card for SATA drives. So what is a good card for SCSI raid? My searches have come up with Adaptec and LSI as the main players here. Are the LSI MegaRAID cards "real" hardware raid? Which cards can give good raid 5 performance? -- Bowie

I've got an i386 server running centos 4.2 with 3 3ware controllers in it -- an 8006-2 for the system disks and 2 7500-8s. On the 7500s, I'm running an all software RAID50. This morning I came in to find the system hung. Turns out a disk went overnight on one of the 7500s, and rather than a graceful failover I got this: Jan 6 01:03:58 $SERVER kernel: 3w-xxxx: scsi2: Command

Is there a "proper" way to put in a pause after network initialization to make sure the network *really* is up? I've had this issue for a while with e1000 cards (even on 100MB networks), where the first NFS mount will fail b/c the network reports up but isn't, really. Now, I'm also seeing the same issue on cluster nodes hooked to a switch with jumbo frames enabled. I

Is there a way in a kickstart install to affect the order in which modules get loaded? I want to load 3w-xxxx before 3w-9xxx so that my OS mirror drives take their proper place as sda and sdb, but centos-4 wants to load 3x-9xxx first, making my (unbootable) big arrays the first two drives. In this configuration, it seems that even trying to install grub to /dev/sdc fails. Ideas? Thanks.

I'm trying to setup a simple NFSv4 mount between two x86_64 hosts. On the server, I have this in /etc/exports: /export $CLIENT(ro,fsid=0) /export/qb3 $CLIENT(rw,nohide) ON $CLIENT, I mount via: mount -t nfs4 $SERVER:/qb3 /usr/local/sge62/qb3 However: $ touch /usr/local/sge62/qb3/foo touch: cannot touch `/usr/local/sge62/qb3/foo': Read-only file system I'd really

Back in the day (read: before the latest firefox update), I used to be able to ssh to a remote box, run 'firefox -local', and have that box fire up its own firefox session even if I was running firefox on the system from I which I sshed. Those days seem to be gone. No matter what I try, if I've got firefox running on my local desktop, the remote firefox command just fires off

On Tue, 22 Nov 2005 11:29:00 -0500 (EST), Joshua Baker-LePain <jlb17 at duke.edu> wrote: > I'm sorry, but making decisions based on Stupid User Tricks is about > the worst policy I can imagine. That way lies madness. No, where lies madness is in the self-centred way in which some people make demands of others to alter innocuous behaviour so that the data requirements of

I've been having no end of issues with a 3ware 9650SE-24M8 in a server that's coming on a year old. I've got 24 WDC WD5001ABYS drives (500GB) hooked to it, running as a single RAID6 w/ a hot spare. These issues boil down to the card periodically throwing errors like the following: sd 1:0:0:0: WARNING: (0x06:0x002C): Command (0x8a) timed out, resetting card. Usually when this

-----Original Message-----From: John R Pierce <pierce at hogranch.com> Reply-to: CentOS mailing list <centos at centos.org> To: centos at centos.org Subject: Re: [CentOS] SCSI drives and Centos 7 Date: Sat, 29 Apr 2017 13:31:11 -0700 On 4/29/2017 12:42 PM, Gregory P. Ennis wrote: > what does `lspci` have to say about this raid card ? > > John, > > Thanks for the prompt

Date: Sat, 29 Apr 2017 10:17:55 -0400 > On Apr 29, 2017, at 9:50 AM, Gregory P. Ennis <PoMec at PoMec.Net> wrote: > > find a way to make the installation disc of Centos 6 identify the SCSI > drives. What model LSI card? Is that card on the RHEL hardware support list? Does LSI/Dell have drivers on their site? Have you tried drivers from LSI/Dell and using the dd(driver disk)

Thank you for your help. Le 05/01/2015 19:10, John R Pierce a ?crit : > works here fine on the 9261, which is an OEM version of the same card > with the connectors in a different orientation... you might check your > LSI firmware revision. My firmware seems to be more up to date. Anyway, I will try to update firmware. I have to check how to do that. # dmesg |grep LSI scsi4 : LSI SAS

On 05/01/2015 15:14, Philippe BOURDEU d'AGUERRE wrote: > Happy new year ! > > We have a SuperMicro server with a LSI MegaRAID 9260-4i controller. > > Since Centos 6.6 update (kernel 2.6.32-504), the controller doesn't > initialize at boot. Reverting to kernel 2.6.32-431 allows server to > boot fine. > I have a similar system, and don't have your problem: #

On 1/5/2015 7:14 AM, Philippe BOURDEU d'AGUERRE wrote: > > Since Centos 6.6 update (kernel 2.6.32-504), the controller doesn't > initialize at boot. Reverting to kernel 2.6.32-431 allows server to > boot fine. works here fine on the 9261, which is an OEM version of the same card with the connectors in a different orientation... you might check your LSI firmware revision.

On 2/16/2016 3:23 PM, Zube wrote: > Does anyone know what program can be used to query the RAID status > from the OS for an on-board LSI SAS 2308-4i? the 2308 isn't actually a megaraid, its a simple SAS HBA that has an optional raid mode IF its flashed with IR firmware... this only supports raid 0/1/10. I always(!) flash these with the IT firmware that turns them back into a

That's weird, because starting with 6.6 we could finally ditch inserting kmods at installation time, the new kernel in 6.6 supported everything. I believe the model we have (among others) is 9341-4i; I would imagine it's pretty similar with what you have. You should open perhaps a bugzilla issue with redhat about this. Lucian -- Sent from the Delta quadrant using Borg technology! Nux!

Is anybody here monitoring Dell SAS6/iR RAID health? I have a mix of CentOS 5.9 and 6.3 installs on the PE1950s. I'm finding drivers and Megaraid Storage Manager downloads via LSI's site, but I'd prefer not to install a bunch of crapware. All I need is the proper LSI daemon which exports info via SNMP. I've used check_sasraid_megaraid Nagios script [0] in the past for PERC5i and

On 4/29/2017 12:42 PM, Gregory P. Ennis wrote: > what does `lspci` have to say about this raid card ? > > John, > > Thanks for the prompt : > > lspci demonstrates : > > 02:01.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID (rev 01) > 02:02.0 SCSI storage controller: Adaptec AIC-7902B U320 (rev 10) > 02:02.1 SCSI storage controller: Adaptec AIC-7902B U320