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• What is the SCSI RAID channels?

  - by erthad

  What is the SCSI RAID channels? I.e. what is the difference between, say, 1-channel RAID controller and 2-channel RAID controller? Is it for data throughput, number of RAID arrays I can create on controller, number of disks I can plug into controller or what else?

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• Two Raid 1s in a single system?

  - by DebAtCQ

  I'm building a Raid array for the first time in my system and I have a question regarding having multiple Raid 1 arrays in a single Win 7 system. I'm a bit of an organizational freak with my data and I currently have two separate hard drives I want to mirror. The new motherboard I'm looking to buy supports Raid, so my question is this: a) can I have more than one Raid 1 array in a single system? b) would I have to buy a separate controller for the second array?

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• Two Raid-1 arrays in a single system?

  - by DebAtCQ

  I'm building a Raid array for the first time in my system and I have a question regarding having multiple Raid-1 arrays in a single Win 7 system. I'm a bit of an organizational freak with my data and I currently have two separate hard drives I want to mirror. The new motherboard I'm looking to buy supports Raid, so my questions are: Can I have more than one Raid-1 array in a single system? Would I have to buy a separate controller for the second array?

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• raid 0 failure, drives look fine

  - by Alan

  Hello, after a lovely blue screen my vista 64 machine decided to reconfigure one of my drives to no longer be part of my raid volume. So now my raid fails as it only has one member disk. This happened to me about 6 months ago and I just changed the disk in question back to a raid disk and all was well. However I cant seem to find that option in my bios or raid config anymore :( Any help would be appreciated

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• How to disable automatic and forced fsck on disks in a linux software raid?

  - by mit

  This is the /etc/fstab entry of a raid system /dev/md4 that is controlled with mdadm and webmin on an ubuntu 10.04 64 server: /dev/md4 /mnt/md4 ext3 relatime 0 0 We tried to switch off automatic forced fsck on rebotts, as we prefer to implement our own scheduled fsck routine by setting the last parameter of the line to 0 (ZERO). But we found out the forced and automatic check still occurs on the underlying real disks, lets say sdb1 and sdc1. How can we switch that off?

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• raid 0 failure, drives look fine

  - by Alan

  Hello, after a lovely blue screen my vista 64 machine decided to reconfigure one of my drives to no longer be part of my raid volume. So now my raid fails as it only has one member disk. This happened to me about 6 months ago and I just changed the disk in question back to a raid disk and all was well. However I cant seem to find that option in my bios or raid config anymore :( Any help would be appreciated

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• Hardware settings reviewing

  - by dino99

  Get some hardware related errors logged into dmesg: oem@dub:~$ dmesg | grep ata10 [ 1.007989] ata10: PATA max UDMA/133 cmd 0xa800 ctl 0xa480 bmdma 0xa408 irq 18 [ 1.691664] ata10: prereset failed (errno=-19) [ 1.691670] ata10: reset failed, giving up oem@dub:~$ dmesg | grep ata2 [ 0.990290] ata2: SATA max UDMA/133 abar m1024@0xfebfb800 port 0xfebfb980 irq 45 [ 1.688011] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 1.688055] ata2.00: unsupported device, disabling [ 1.688057] ata2.00: disabled As I understand, its related to my old Seagate SATA HDD, and the PATA CDROM. These errors are quite new, so I feel that their settings (dma, write-cache, ...) have been modified by some upgrades. I've already used hdparm to set write-cache off on the HDDs. But it seems like I need to review some other setting(s) too. With oldest distro it was easy to know about the hardware settings, but now on Quantal/Precise its deeply hidden for the average user. So i would like to know how to view/modify these settings. About the CDROM reader, the problem is different: - the system don't identify it with an UUID; but only with ATAPI or by-id oem@dub:~$ dmesg|grep 'ATAPI' [ 1.308611] ata3.00: ATAPI: TSSTcorp CDDVDW SH-S203D, SB00, max UDMA/100 oem@dub:~$ ls -l /dev/disk/by-id/ ...... lrwxrwxrwx 1 root root 9 oct. 1 06:42 ata-TSSTcorp_CDDVDW_SH-S203D -> ../../sr0 .....

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• Partner Webcasts: EMEA Alliances & Channels Hardware Webinars, July 2012

  - by swalker

  Dear partner Oracle is pleased to invite you to the following webcasts dedicated to our EMEA partner community and designed to provide you with important news on our SPARC and Storage product portfolios. Please ensure you don't miss these unique learning opportunities! 1. How to Make Money Selling SPARC! TOMORROW: 3PM CET (2pm UKT), Tuesday, July 10, 2012 The webcast will be hosted by - Rob Ludeman, from SPARC Product Management Agenda: To bring our partners timely, valuable information, focused on increase in their success during selling SPARC systems. The webcast will be focused and targeted on specific topics and will last approximately in 30 minutes.You can submit your questions via WebEx chat and there will be a live Q&A session at the end of the webcast. REGISTER 2. Introduction to Oracle’s New StorageTek SL150 Modular Tape Library 3pm CET (2pm UK), Thursday, July 12, 2012 This webcast will help you to understand Oracle's New StorageTek SL150 Modular tape library which is the first scalable tape library designed for small and midsized companies that are experiencing high growth. Built from Oracle software and StorageTek library technology, it delivers a cost-effective combination of ease of use and scalability, resulting in overall TCO savings. During the webcast Cindy McCurley, from Tape Product Management will introduce you to the latest addition to the Oracle Tape Storage product portfolio, the SL150 Modular Tape Library. This 60 minutes webcast will cover the product’s features, positioning, unique selling points and a competitive overview on StorageTek. You can submit your questions via WebEx chat and there will be a live Q&A session at the end of the webcast. REGISTER Delivery Format This FREE online LIVE eSeminar will be delivered over the Web and Conference Call. Note: Please join the call 10 minutes before the scheduled start time. We look forward to your participation. Best regards, Giuseppe Facchetti EMEA Partner Business Development Manager, Oracle Hardware Sales Sasan Moaveni EMEA Storage Sales Manager, Oracle Hardware Sales

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• Experience with AMCC 3ware 9650se raid cards? Ours seems dead

  - by antiduh

  We have a 8-port 3ware 9650se raid card for our main disk array. We had to bring the server down for a pending power outage, and when we turned the machine back on, the raid card never started. This card has been in service for a couple years without problems, and was working up until the shutdown. Now, when we turn the machine on, the bios option rom that normally kicks in before the bootloader doesn't show up, none of the drives start, and when the OS tries to access the device, it just times out. The firmware on it has been upgraded in the past, so it's possible we've hit some sort of firmware bug. We're using it in a Silicon Mechanics R272 machine with gentoo for the OS. The OS eventually boots, but alas, without the card. We've ordered a new one, but I'm worried that if we replace the card it won't recognize the existing array. Has anybody performed a card swap before? Any help would be greatly appreciated.

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• How to fast get Hardware-ID in C#?

  - by guaike

  I need in my license Program use hardware id ,I tried use WMI,but it still slow . I need Cpu,HDD,Motherboard info.

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• Serious problem with my sound system, No Hardware detected Suddenly, Please Help

  - by Aravind

  I'm Quite new to this Ubuntu but recently started using it, 2 days back I had problem with muting the Laptop speaker when headphone jack is plugged, to resove this i searched and somehow tried with the Alsa mixer and got it perfect. FYI this is the output of the Alsa script: [http://www.alsa-project.org/db/?f=9ec8099800aca2cb74ee35c2bf58125e45ca9f43][1] But since today morning there is no sound and no sound hardware are detected!! it looks like below http://i.imgur.com/gnK8R.png http://i.imgur.com/nxgvU.png Please help, - regards Aravind

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• RAID 5 RECONSTRUCT with RAID Reconstructor

  - by user22914

  I have Dell Poweredge server 2600 with Raid 5 in 3 hard drive Scsi 36gb each, it was fail to boot sinc the third drive is offline. I attached Sata card adapter to Sata hard drive and install OS SERVER 2003 to it, downloaded drivers for Raid and everything goes fine when I use recovery data software called "GetDataBack" from here http://www.runtime.org/data-recovery-software.htm but the problem that not all data recovered, I am still looking for importants data with about 5 GB size. I have another software called "RAID Reconstructor" from "http://www.runtime.org/raid.htm" I thought if I run it to reconstruct that will help to recover more data and put the third drive to be Online but I am afraid that might erase the current data in the other drives. Please I need your advise in how I could retrive the remaining data? Thanks

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• Getting VMWare ESXi 5.0.0 with RAID using the Intel X79 chipset to work

  - by Deleted

  I have bought a new server where I use the motherboard ASUS P9X79 WS X79 S-2011 ATX. It will be used for virtualization, preferably using VMware vSphere Hypervisor™ (ESXi) if I can get the RAID on my motherboard working with VMWare (it does not detect it). The motherboard has the Intel® X79 chipset, which for RAID controller means vendor ID 8086 (Intel) and model ID 2826. When I boot the ESXi 5.0.0 installation media from my flash drive I can not see drives in the RAID5 set I created. Questions: Is there a VIB file for the RAID controller I can use? I have found one article at http://www.intel.com/support/motherboards/server/sb/CS-033313.htm on getting RAID to work with some Intel controllers, it lists 9 integrated RAID modules it is comptabile with. However, there is no mention of the X79 chipset.

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• Reconfigure RAID on Dell PowerEdge T710

  - by Stefano Borini

  I have a Dell PowerEdge T710 under my feet at this very moment, with RedHat Enterprise Server 5.3. I have 6 1TB disks and two 500GB. parted reports two devices, one 500 GB and the other 4 TB. So I assume the RAID has been setup as mirror for two disks, and I assume as RAID 5 the remaining ones. I say "I assume" because it does not make sense. Having 6 disks in RAID 5, I should obtain a total space of 5 TB, not 4TB. It's not even RAID 10: I would end up with a 3 TB unit. How can I check and eventually modify the RAID array definition? In the Fujitsu Siemens I played with some time ago, at boot I had the chance to enter the controller BIOS, but here I don't see a clear way to perform this operation.

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• Advantages of multiple SQL Server files with a single RAID array

  - by Dr Giles M

  Originally posted on stack overflow, but re-worded. Imagine the scenario : For a database I have RAID arrays R: (MDF) T: (transaction log) and of course shared transparent usage of X: (tempDB). I've been reading around and get the impression that if you are using RAID then adding multiple SQL Server NDF files sitting on R: within a filegroup won't yeild any more improvements. Of course, adding another raid array S: and putting an NDF file on that would. However, being a reasonably savvy software person, it's not unthinkable to hypothesise that, even for smaller MDFs sitting on one RAID array that SQL Server will perform growth and locking operations (for writes) on the MDF, so adding NDFs to the filegroup even if they sat on R: would distribute the locking operations and growth operations allowing more throughput? Or does the time taken to reconstruct the data from distributed filegroups outweigh the benefits of reduced locking? I'm also aware that the behaviour and benefits may be different for tables/indeces/log. Is there a good site that distinguishes the benefits of multiple files when RAID is already in place?

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• Do I need to rebuild the array after putting in a new hot spare?

  - by Shade34321

  So my experience with RAID is minimal. So I figured I'd come and ask here. We have a 16 drive RAID system that have 15 drives in RAID 5 with a hot spare left over. Recently one of the drives in the RAID was giving errors so I cloned it over to the hot spare and put a new drive in it's spot. I made the new drive the hot spare as I was told. I was told to rebuild the array after putting in the new drive as a hot spare so I tried and wasn't able to. So my question is do I need to rebuild it and if so why did it tell me I couldn't. Thanks! UPDATE: So I've come back up to work and looked at the RAID and it pulled in the hot spare into the raid and kicked out another drive.

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• How to enable raid on Gigabyte G33M-S2L?

  - by Wabbitseason

  I'd like to set up RAID-1 on my Gigabyte G33M-S2L motherboard and for this reason I purchased two 1T hard drives. According to SiSoft Sandra the motherboard does support RAID but it is disabled. I looked everywhere in BIOS even upgraded it to the most recent version but found nothing that would have said "RAID" and the operating system I wish to install sees the two HDDs, not just a RAIDed one. What could be the problem? Does my motherboard support RAID (as the diagnostic tool claims) or do I need to buy a RAID card?

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• Will disk cloning resolve bad stripes on RAID?

  - by user13323

  Hi. We have a logical RAID1 drive in bad stripes state, which kept that status even after replacement and rebuilding of both drives, and gives errors in Windows logs about failure of writing to disk. IBM support suggests erasing and re-creating the RAID, then re-installing the Windows. The resulting down-time unacceptible for us, so we want to clone the RAID (via Acronis True Image), erase and re-create the RAID, then dump the cloned data back. Following IBM logic where RAID erasing and re-creation resets the whole RAID meta-data, this should clear the bad-stripes status, and start from a blank page. Question is if such strategy is possible, and will produce the desired effect? Any idea is appreciated - thanks in advance!

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• Openfiler RAID 10 option not found

  - by chrisling106

  Hi, I'm building a NAS using Openfiler2.3 (from 32-bit ISO), first of all I want to experiment it on VM first before going out and buy the harddrives needed. I created 5 virtual drives on VMware, sda is 2GB and the rest 1GB each (sdb to sde). I left sda blank and want to setup a RAID 10 disk using sdb, sdc, sdd and sde, 4 RAID partitions are setup successfully, but when I try to create a RAID device the only option for RAID level is 1, 0, 5 and 6. RAID 10 is not there! Can someone let me know what have I missed, please? TIA.

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• Does RAID 1 protect against corruption?

  - by Shaun

  Does Raid 1 protect against data corruption? For example, let's say that I am keeping all of my important files on a NAS that uses 2 disks in a RAID 1. If one hard drive has some kind of internal problem and the data becomes corrupted, does the RAID recognize this automatically and correct it using data from the other good disk? Could it even know which copy is the good one? Does RAID 5 protect against corruption? I know that RAID is not a backup solution. I am trying to figure out how to make sure that I am not backing up corrupt data!

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• How to view status of software RAID 1 resynching?

  - by tputkonen

  I have two 500 GB disks and yesterday I mirrored first drive to the second one using software RAID 1. PC has now been on for 30 hours. Both disks say "Resynching", but there is no progress indicator. In addition, there is a small yellow exclamation mark on both disks. My questions are: How long could the synch take for 500 GB drive with about 150 GB of data? PC has 4 GBs of RAM and AMD dual core 4000+ Is there a way to monitor status of the synching? How can I check what the exclamation mark means?

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• How to recover data from software RAID 5 disk partition

  - by Ali n

  I have CentOS 5.8 on my computer, with 5x 1TB hard drives. I used software RAID. (RAID 1 as a boot partition md0, RAID 0 as a root partition md1 and RAID 5 as /home partition md3). Unfortunately one of these hard drives failed lately and I want to replace it with a new one. I want to know that is it possible to change this hard drive without data loss? The important partition is RAID 5 so in theory if one of hard drives failed I should be able to recover its data without any problem. But in practice how can I do that?

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• Certain drives in RAID 5 set intermittently are not recognized

  - by hydroparadise

  I have a curious problem in that 1 (sometimes 2) drives do not get recognized in a RAID 5 set. The server is getting rather old at 5 to 6 years, but still seems to function well once the machine sees all drives. So that leaves me with three areas to consider: the motherboard, the SATA RAID card, or the individual hard drives themselves. I am leaning toward the RAID card, but have not had much dealings with RAID cards. What would cause individual drives not to be recognized in the set? If it was the card, I would think that it would be all or nothing. If it were a single drive, is it possible that it would only work sometimes? The only other thing to consider is that that they are different drives (Seagate and Western Digital) but all around 80 GB. SATA RAID controller is 3ware Escalade 8506-4LP Motherboard is a SuperMicro P4SPA+ Am open and available for more details if needed...

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• some questions about raid card

  - by cpps

  I have some questions about raid card. Use LSI MegaRAID® SAS 9260-8i raid card as a example. There is only two connection ports on the raid card, and they provide two cables that can connect 8 SAS/SATA storages. The document say it can connect "Maximum 32 drives per controller", I want to know how can I connect more than 8 hard disks with this card. Is that they say "Eight internal SATA+SAS ports" means they provide two cables which can connect 8 hard drives, but you can use other way to connect Maximum 32 drives? The other question. I see host bus adapter has raid integrated , so what is the difference between host bus adapter and raid card. Are they the same? I also know is SAS/SATA Expander's function only to connect more hard drives? Thanks in advance.

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• From which plex am I booted from on raid?

  - by rumburak

  I have a server with mirrored boot volume. It is software raid 1 in Windows Server 2008 R2. I do not have physical access to the server. I am looking for a way to check which disk is a boot drive. I need a way to check it from os. How can I do that ? EDIT: I know how to do that, but I dont think its proper way. From diskpart I can break mirror: select volume 0 break disk=0 And Windows will only allow me to do that on not current boot disk. I want to check which one is boot without breaking mirroring.

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