RAID, an acronym for Redundant Array of Independent Disks (sometimes incorrectly referred to as Redundant Array of Inexpensive Disks), is a technology that provides increased storage functions and reliability through redundancy. -Wikipedia

learn more… | top users | synonyms

1
vote
1answer
312 views

i2c cable for 3ware 9650se and SuperChassis 846A-R1200B

What's the appropriate cable to support i2c (red LED drive indicator, failure) with this combination and what's the best way to order it? I see 3ware supports 846TQ but not 846A from ...
1
vote
1answer
544 views

Silent e2fsck - safe to stop?

Before a grow on a 8 TB RAID5, I am currently doing an e2fsck. While the RAID was running w/o issues before (I switched from Ubuntu to CentOS 5.4 because I needed a specific hardware driver), the ...
2
votes
3answers
135 views

Why is striping not applied to harddisks internally?

This question bothers me for years now... If it is inappropriate here, a valid answer would point me to the perfect place. As far as I know, striping is used in several storage situations to speed up ...
10
votes
7answers
2k views

How do you backup a storage server?

I'm looking at implementing a very large storage server to be used as live NAS for several other servers (all Linux-based). By very large, I mean between 4TB and 20TB usable space (although it's ...
4
votes
2answers
3k views

Where should my swap partition/s live when using software RAID1? Performance? LVM?

When I search around for example RAID1 installations, it seems that admins tend to place their swap partition under RAID1. To me, it is more intuitive to have two disks, each with a large partition ...
1
vote
3answers
4k views

Maximum single SATA disk size in Proliant ML350 G6

I have a freshly configured HP Proliant ML350 G6 (initially diskless) server running Windows Server 2008 R2 Enterprise. Is it possible to use four 1.5Tb disks in an internal RAID10 array in Proliant ...
1
vote
1answer
485 views

Generate a new Volume ID in Linux

Sparing most details/reasons, I have a situation in which I'm cloning drives for mass production. Some of them are being installed in servers that only need one disk (in that case this is a ...
1
vote
1answer
1k views

Ubuntu Server Won't Boot to Raid 1 Array

I have a 4 drive RAID array. A small part of each disk is partitioned and used in RAID 1 for /boot. Everything else is RAID 5. When I start the computer GRUB2 shows up and I can use its command line ...
1
vote
4answers
1k views

2 drives failed in raid 5

I had a 4 disk software based raid5. Two drives failed at the same time, so I'm at 2/4 operational drives. I have run raid5 with 2 drives before, but this doesn't seem to want to mount. Can you add ...
1
vote
1answer
371 views

Trouble attaching more than 6 EBS volumes to EC2 instance

I'm using chef to create RAID10 arrays. Last friday morning (10/22) I was able to create arrays with 9 EBS volumes on dev/sdz1-9 with no problems I started having trouble attaching more than 6 EBS ...
1
vote
2answers
476 views

GlusterFS with RAID-1

Is it possible to use GlusterFS to have more flexible FS and to support higher capacity + RAID-1 to have redundancy to avoid data loss in case of failure? I need to get a mirrored FS that has high ...
1
vote
3answers
1k views

SSD RAID 1 and INTEL S5520SC

I've a server using INTEL S5520SC motherboard. I was wondering if it's possible to connect 2 SSD 128GB INTEL EXTREME drives in RAID 1 directly to this motherboard or would I need some kind of external ...
0
votes
2answers
656 views

How do I replace a raid-1 software raid array on Mac OS X with a larger one?

Here is my current situation: Mac Pro Server with 1x normal OS drive and 2x 750Gb data drives in a raid-1 configuration. I'm starting to fill up the space on the data drives and would like to ...
1
vote
6answers
3k views

Swap entire disk set between Dell poweredge servers

I have a dell poweredge R610 which has 2 x 140 gb harddrives mirrored (hardware) running a high cpu intensive application in windows 2008 R2. We recentely purchased a new dell poweredge R610 which has ...
0
votes
2answers
210 views

What is the best way to repartition the system drive on a Windows domain controller?

I have a Windows 2003 server that is the primary domain controller for the network. It has a RAID 1 array that houses the 'C' and 'D' drives. And a RAID 5 array that houses the 'E' drive. The C:\ ...
5
votes
3answers
3k views

RAID 5 with big SATA disks. Do or don't?

Is it sane to build a machine with RAID 5 expecting to hold around 5 Tb (and able to grow) with 1.5 or 2 Tb SATA II disks? It will be used as audio and documents storage. I already have chosen a ...
0
votes
1answer
414 views

Failing Sata HDD

I think my HDD is fried... Could someone confirm or help me restore it? I was using Hardware RAID 1 Configuration [2 x 160GB SATA HDD] on a CentOS 4 Installation. All of a sudden I started seeing bad ...
1
vote
5answers
1k views

MegaCLI always returns blank output

This server is a Dell R200 running Ubuntu 8.04LTS using a LSI SAS1068E raid card supplied from Dell, I suspect that there might be some kind of RAID issue with the hardware raid built into the ...
1
vote
3answers
812 views

mdadm & raid6: does “re-create(with different chunk size) + resync” destroy orig. data?

I would like to rescue data on my software raid-6 array. I did some stupid actions (described bellow) with this original array. Main Question: I need to know if original data stored on raid-6 array ...
2
votes
1answer
1k views

software RAID array not starting in initramfs on Debian

One of my Debian servers (kernel 2.6.30-AMD64) refuses to start the software RAID array that houses the root partition in initramfs. It dumps me with a busybox console. When I follow the necessary ...
1
vote
3answers
122 views

RAID on a low-traffic server?

My company is buying a couple servers. I don't have a sysadmin background and neither does anyone at my company but I'm the "computer guy" so it falls to me to spec them out. We were given the option ...
4
votes
3answers
7k views

Can we mount multiple disks as one directory?

Are there way to mount the different disks as one directory? Assuming I have some disks with ext4 partitions: /dev/sda1 1Tb mounted as /store1 /dev/sda2 2Tb mounted as /store2 /dev/sdb1 2Tb mounted ...
3
votes
3answers
469 views

How to bulid 36TB raid matrix for data storage

Is it possible to build 5k$ (VAT not included) raid matrix PC with 36TB storage? What configuration would you suggest?
4
votes
4answers
3k views

JBOD SAS adapter for Solaris/Nexenta on Dell PowerEdge 2950?

Given: One or more available Dell PowerEdge 2950 servers The desire to deploy ZFS iSCSI storage using Nexenta or Solaris ZFS uses software RAID Dell's PERC 5 RAID controllers do not support JBOD ...
1
vote
3answers
494 views

SAS Drives on VMWare ESXi Installable 4.0 u2 Too Slow?

We are running a Dell PowerEdge T710 with a PERC H200 RAID controller and two mirrored SAS drives. We just patched to Update 2 because our SAS drives were extremely slow and it mentioned somewhere ...
0
votes
2answers
2k views

HP Smart Array 641 w/ failed drive - will not recognize replacement?

Have an old HP ML370 G4 server, drive 1:3 failed and went offline. We swapped in a replacement drive (from an old server, same size, RPM, etc, but different brand). It is still showing the drive as ...
6
votes
4answers
1k views

ZFS on top of Hardware Mirroring, or just mirror in ZFS?

I have an IBM x346 with dual 3.2Ghz Xeons and 2x36GB 15k SCSI disks. I'm running an entirely ZFS-based install of FreeBSD 8.1. I can configure the bios to mirror the two disks, and then put ZFS on ...
2
votes
3answers
537 views

Super high density disk chassis

Certain companies (LSI, DDN) have enclosures that hold 60 hard drives in 4U of space. Why is it that these kinds enclosures aren't available unless you get them as a part of a "solution"? A 24 bay ...
1
vote
0answers
462 views

Replacing LeftHand SAN Hard Disk Outside of Warranty / Service Contract

I am working with 3 clusters of LefHand SAN iSCSI storage arrays. The modules are all older NSM 150s and NSM 160s (super micro server hardware, sata disks). The workload is low priority and all ...
0
votes
1answer
437 views

Recovering data from failed Raid configuration with 4 drives and two raid sets (Asus P6T / Intel ICH10r)

I've added the complete detailed version for my question below for those who can help, but want to quickly summarize my question first. I setup two Raid arrays using (4) WD Raptors, a striped set for ...
3
votes
3answers
1k views

Zpool disk failure - Where am I at?

After checking the status of one of my zpools today, I was faced with the following: root@server: zpool status -v myPool pool: myPool state: ONLINE status: One or more devices has experienced an ...
2
votes
2answers
1k views

What is a RAID superblock?

I tried searching for this answer, but all of the pages just use the term 'superblock' without defining what it is.
0
votes
1answer
1k views

ESXi 4 Expanding VMFS partition, does order matter?

I'm trying to get ESXi4.0.0 to increase the VMFS partition to match my newly increased RAID 5. I went from ~850GB to 1250GB on the RAID virtual disk, and VMWare is showing the correct amount of space. ...
1
vote
3answers
423 views

Linux RAID1 Software - grub resync after fail

I've a linux server with 2 IDE HD & Raid (hda - hdb) I've changed the "BAD" hdb with a new: mdadm --fail /dev/md2 /dev/hdb3 mdadm --fail /dev/md0 /dev/hdb2 mdadm --fail /dev/md1 /dev/hdb1 ...
4
votes
4answers
3k views

How can I get WMI to return info on physical disks in Dell Poweredge server with RAID enabled?

I'm using WMI to gather stats on some of our servers, and I'm trying to get details of the physical disks that are installed in each server. The servers are various Dell PowerEdge models. Windows' ...
0
votes
1answer
249 views

upgrading ubuntu with mdadm raid

My Situation: I have a file server running ubuntu 8.04, and would like to upgrade it to 10.04 by removing the current drive that contains the OS, and putting in a clean drive and installing to that. ...
0
votes
3answers
385 views

Can RAID controller degrade my server's performance somehow?

I'm running a small IT company. Specifically less than 10 persons all are developers and no system administrator. I am so to say the owner doing much of work. So now I am asking the question being a ...
1
vote
4answers
971 views

Slow logical volume detection

I am experiencing some issues with test server lately. It was installed few days ago and worked OK until yesterday, when it did not wake up after reboot. Bootloader did not find root device. Error: ...
2
votes
5answers
567 views

Which is the best RAID between RAID 10 and 0+1?

Could anyone tell me which RAID would be the best between 10 and 01, and why? Thanks for your help. EDIT: I didt't want to know what's the best RAID ever... Otherwise I'd ask: "Why is NetApp RAID-DP ...
1
vote
1answer
838 views

Is it possible to change the Raid5 chunk size of an existing device?

I have an existing raid5 device which I created using mdadm on Linux. When I created the device I set the chunk size to 64 but I would like to test the performance of various sizes but I don't want ...
2
votes
1answer
1k views

FreeNas on Dell Powervault 745N: 2TB Limit?

I want to purchase 2 x 2TB drives, and install FreeNas on my Dell Powervault 745N. People on the internets seem to be having trouble with the MD3000 firmware, and I want to make sure I can solve any ...
0
votes
2answers
420 views

Removing a HDD from a RAID 1 SATA HDD will it still work?

I have a a Proliant ML 110 G5 server with an Embeded SATA controller running RAID 1 on two 160 GB drives. I had an issue with my CentOS Installation and after running e2fsck (via Ubuntu Pendrive) y ...
1
vote
2answers
1k views

Dell PowerEdge 6850 Degraded HDD

Good Morning, We have a dell power edge 6850 with a degraded drive in the RAID array. I have never had to recover such an issue, so any help or advice would be welcome. Basically it hasn't affected ...
0
votes
1answer
508 views

How to resize ext3 partition without having physical access to the server

I have a server with 2 hard drives mounted as raid 1 using Ubuntu 8.04.4 LTS Filesystem Size Used Avail Use% Mounted on /dev/md1 5.0G 5.0G 0 100% / varrun ...
1
vote
4answers
380 views

How “swappable” are RAID 1 drives?

My lab is considering setting up a server with an attached RAID device for storing our large imaging datasets. (probably a Mac Mini server with attached Promise SmartStor DAS w/ 4 1TB hard drives) ...
1
vote
1answer
718 views

S.M.A.R.T Status of ServeRAID M5015 on Lenny?

any experience with checking smart status of a ServeRAID M5015 under debian 5 lenny? thanks!
2
votes
2answers
374 views

move Ubuntu to RAID

I have an Ubuntu Server up and running on LVM2 partition. My motherboard supports RAID 0 and 1. I bought new, second HDD, the same as the system one. I want to set up RAID mirroring to ensure my data ...
0
votes
5answers
4k views

HP Proliant ML110 G6 as first file server (RAID)?

Bit of a noobie and this will be the 1st server hardware I have purchased. We are a small design studio and I am about to buy our 1st server. I have successfully run Ubuntu on an old PC which has ...
0
votes
4answers
13k views

Can I recover a RAID 5 array if two drives have failed?

I have a Dell 2600 with 6 drives configured in a RAID 5 on a PERC 4 controller. 2 drives failed at the same time, and according to what I know a RAID 5 is recoverable if 1 drive fails. I'm not sure if ...
0
votes
1answer
187 views

recovering from a crash. data stored on a 3ware 9650SE-LP mirrored set

So I'm hoping this will be very easy because my drive that failed is not part of my mirrored set. I had my OS drive go bad but my data drive ( my 2TB mirrored set ) is still ok. I just can't access ...