Re: 3ware 9650 tips
On Mon, 16 Jul 2007 at 12:41pm, David Chinner wrote If you've got any sort of serious disk array, ext3 is not the filesystem to use I do so wish that RedHat shared this view... -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: 3ware 9650 tips
On Fri, 13 Jul 2007 at 2:35pm, Justin Piszcz wrote On Fri, 13 Jul 2007, Joshua Baker-LePain wrote: My new system has a 3ware 9650SE-24M8 controller hooked to 24 500GB WD drives. The controller is set up as a RAID6 w/ a hot spare. OS is CentOS 5 x86_64. It's all running on a couple of Xeon 5130s on a Supermicro X7DBE motherboard w/ 4GB of RAM. Trying to stick with a supported config as much as possible, I need to run ext3. As per usual, though, initial ext3 numbers are less than impressive. Using bonnie++ to get a baseline, I get (after doing 'blockdev --setra 65536' on the device): Write: 136MB/s Read: 384MB/s Proving it's not the hardware, with XFS the numbers look like: Write: 333MB/s Read: 465MB/s How many folks are using these? Any tuning tips? Thanks. You are using HW RAID then? Those numbers seem pretty awful for that setup, including linux-raid@ even it though it appears you're running HW raid, this is rather peculiar. Yep, hardware RAID -- I need the hot swappability (which, AFAIK, is still an issue with md). -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Linux Software RAID a bit of a weakness?
On Mon, 26 Feb 2007 at 5:26pm, Colin Simpson wrote SATA isn't supported on RH 4's SMART. Not true (for many SATA chipsets at least). Just pass '-d ata' to smartctl. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: MegaRaid problems..
On Thu, 12 Oct 2006 at 10:06am, Gordon Henderson wrote I'm wondering about things like the controllers needing some poking at the BIOS level, but I've looked and there isn't a JBOD mode - only various built-in RAID modes, so I've not created any RAID sets through the BIOS (I want raid 6 on this box over all 15 drives) Some RAID cards don't explicitly have a JBOD mode but instead an option that says something like Export unconfigured disks, and ISTR that MegaRAID may be that sort of card. Poke about in the card BIOS a bit more. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Monitoring hardware raid
On Mon, 2 Oct 2006 at 8:52am, Mauricio Tavares wrote I have here a full tower full of drives that is a self-standing hardware raid which is connected to a redhat 9 box through a scsi cable. Without knowing much more (I am trying to learn more about it like what it is up to), is there a raid monitoring package for linux I can use to find out what is on its mind? Clicking the buttons besides the LCD on the raid box is just not me. And, as I implied, unfortunately I do not know much about that raid (like manufacturer, cards used, and so on) as of now. It is a bit of a black box... literally. Generally those sorts of boxes have a serial port you can talk to to get status and the like. They may also have an out-of-band ethernet port for the same thing. All of this is very manufacturer dependent though, *and* has nothing whatsoever to do with linux-raid... -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: RAID-5 making big partition fails
On Tue, 19 Sep 2006 at 4:39pm, Gaspar Bakos wrote I have a 12 disk RAID-5 hardware RAID with an ARECA card. This is under FC5, 2.6.17.6 kernel. The areca driver correcly reports 5Tb diskspace on this unit, shown as /dev/sdc: # fdisk /dev/sdc fdisk won't work. I also tried 'gparted', but the same problem. In parted, you need to 'mklabel gpt'. Standard msdos disklabels don't handle devices 2TiB. You won't be able to boot off this device, but it looks like that's not a concern for you. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Correct way to create multiple RAID volumes with hot-spare?
On Wed, 23 Aug 2006 at 6:34am, Justin Piszcz wrote On Tue, 22 Aug 2006, Steve Cousins wrote: As for system information, it is (was) a Dual Opteron with CentOS 4.3 (now I'm putting FC5 on it as I write) with a 3Ware 8506-12 SATA RAID card that I am using in JBOD mode so I could do software RAID6. If you are using SW RAID, there is no 2TB limit. Ditto for more recent HW RAIDs. *However*, there are other considerations when dealing with 2TiB devices. E.g. you can't boot from them. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Megaraid, howto?
On Thu, 20 Jul 2006 at 9:14am, Pieter Steyn wrote I have a few hosts that use Megaraid controllers. Could someone please show me an effective way to monitor the status? I've used the software on dells website, and the only program partly useful was Megamon, which is a gui menu based program that runs on the shell, I've written an expect script that gives me the proper output when I run the program on that shell, but it does not work from within crontab / ssh hostname command. Problems like that are almost always due to a difference in the shell environments of your login shell and crontab. Make sure all your paths are explicit and stuff (that's a technical term, son) like that. If anyone could please tell me of either an alternative way / or how I can get my expect script to work through crontab, I'd greatly apreciate it! I have a (very/embarrassingly) crude script which uses megarc (downloaded directly from LSI). It greps the output of megarc -dispCfg -a0 for DEGRADED. If it finds that then it emails me and also touches a state file so it doesn't continue mailing me every 15 minutes (which is how often I run it). -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Large single raid and XFS or two small ones and EXT3?
On Sat, 24 Jun 2006 at 3:52pm, Adam Talbot wrote nas tmp # time tar cf - . | (cd /data ; tar xf - ) A (bit) cleaner way to accomplish the same thing: tar cf - --totals . | tar xC /data -f - -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Real Time Mirroring of a NAS
On Fri, 7 Apr 2006 at 6:47am, andy liebman wrote I'm looking for a way to create a real-time mirror of a NAS. In other words, say I have a 5.5 TB NAS (3ware 16-drive array, RAID-5, 500 GB drives). I want to mirror it in real time to a completely separate 5.5 TB NAS. RSYNCing in the background is not an option. The two NAS boxes need to hold identical data at all times. It is NOT necessary that the data be accessed from both NAS boxes simultaneously. One is simply a backup of the other. I guess one option might be to use Redhat's Global File System (GFS). Although there seems to be an 8TB limit for a GFS filesystem, which could be an issue down the road. I don't have any experience with it, but I've often seen DRBD mentioned for just this sort of situation. I'd look into that. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: mdadm and large RAID
On Fri, 31 Mar 2006 at 2:02pm, Cesar Delgado wrote Here's the story. We purchased a box with ~8TB space. It has 2 fiber connections so, we thought, to maximize throughput into the device we could build 2 RAIDs in hardware, on the box, and export each one out each fiber channel and then create a striped raid of the two devices at the hardware level. Due to the way we created the 2 RAIDs each export is ~3TB. What we've tried. We tried making a RAID 0 with mdadm over the two devices. There appears and entry en /dev/mdstats showing the RAID. Then we try to put XFS on it, the machine hard locks. We tried formatting each separate device and there were no problems. The machine just hard-locks when I try to put the filesystem on the RAID. You're missing a lot of vital information: what distribution are you using, what version of mdadm, what fiber adapter, etc. There's not errors in the logs. The machine freezes up too quickly. Have you tried a serial console and or remote syslog? -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: benchmarking
On Wed, 1 Feb 2006 at 6:28pm, Tom Peters wrote Does Linux (SuSE 9) have a tool that will give me a handle on read/write throughput to a drive without trashing anything on the drive (i.e. using empty space on it)? I have an 8-drive array and sometimes writes to it fail over the network (Samba) and I can't prove its the array and not the network. I've played with hdparm -Tt and gotten some idea. What else can I try that won't take a lot of setup? bonnie++ is very easy to compile and use, and tiobench only slightly less so. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: 3ware RAID (was Re: RAID resync stalled at 99.7% ?)
On Fri, 2 Sep 2005 at 11:09am, Brad Dameron wrote On Thu, 2005-09-01 at 13:50 -0400, berk walker wrote: I guess if we were all wholesalers with a nice long lead time, that would be great, Brad. But where, and for how much might one purchase these? b- http://www.topmicrousa.com/controllers--tekram.html http://www.rackmountpro.com/productsearch.php?catid=199 http://www.pc-pitstop.com/sata_raid_controllers/ Just for starters. Google found those by the way. And yes they are a little more than 3ware. But I can say they do twice the performance of the 3ware cards. Mainly due to their 800Mhz processor and faster memory. Their driver support is also more upt to date. But has it made it into the mainline kernel yet? 3w- has been in mainline for a *long* time. 3w-9xxx is still settling a bit, that's true, but it's doing so in mainline. Personally, I wouldn't put important data on an Areca controller until the drivers have been through wider testing than the -mm series (where I believe they're currently percolating). -- Joshua Baker-LePain Department of Biomedical Engineering Duke University - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
