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

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2
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1answer
153 views

Redundancy level on a per file basis with BTRFS?

I would like to have one storage pool with multiple disks. Raid5 for metadata of course. But for user-data I would like to set the level of redundancy on a per file or per subvolume level. Can BTRFS ...
3
votes
1answer
162 views

how to merge 2 controller (6 Bays each) in HP DL370 G6

I am having a server DL370 G6 as seen in the image below, and I want to install Windows Server 2008 E. we are using it for camera recording. Each slot has 6 2 TB hard disks. I want to merge both as ...
3
votes
1answer
3k views

CentOS 6.5 with HP ProLiant DL360e Gen8

I have a chance to install a new HP ProLiant DL360e Gen8 server. There are three hard drives. How do I configure RAID 1 on this type of server. Will RAID already be configured so that it will look ...
0
votes
1answer
58 views

Is it possible to write into RAID chunk multiple times?

As far as I know, (most) file-systems do not support one to write into file-system cluster multiple times. In other words, cluster is the smallest unit in file-system and even if a single bit of ...
1
vote
1answer
531 views

Installing XenServer 6.2 on Proliant DL160G6 freezes during “Installing from base pack”

I'm trying a new install of XenServer 6.2 on an HP Proliant DL160G6 with a HP P410 raid card configured as RAID 5 over 4 drives, with a 256M BBWC. The install starts off properly, but when it gets to ...
15
votes
8answers
2k views

Do snapshots + RAID count as a good on-site backup solution?

The two main reasons I can think of for taking backups seems to be taken care of when I use both snapshots and RAID together with btrfs. (By RAID here, I mean RAID1 or 10) Accidental deletion of ...
0
votes
2answers
166 views

Is mdadm RAID Toast?

I took all my drives out and put them onto a new cpu/mobo. (upgrading) I boot up and mdadm claims it can't boot my degraded RAID. /dev/sdb sudo mdadm --examine /dev/sdb /dev/sdb: ...
0
votes
1answer
477 views

How to perform disk test attached to LSI RAID controller

I have four Seagate ST33000657 SAS drives attached to LSi 9260-4i controller. I want to test them for hw errors and bad sectors, before launching into production. I ve tried SeaTools, but it's not ...
0
votes
0answers
55 views

SATA III HDDs not working on SATA II RAID HBA

I would appreciate any help with this. We have Sunfire x4275 disk server with Sun StorageTek SAS RAID HBA and trying to get working these disks: WD RE 4TB Enterprise SATA III (WD4000FYYZ) Sun RAID ...
0
votes
1answer
82 views

JBOD or RAID on a streaming server setup

Currently my setup is 1 main server which holds all the mp4 videos and 3 other servers which holds portions of this video. The process is: when a user uploads a video, it is stored into the main ...
0
votes
0answers
57 views

mke2fs.ext3 stripe-width option missing

I'm trying to set up an ext3 filesystem on a RAID 6 array (with 6 disks) on XenServer 6.2 linux. All the help I can find tells me to use the -E stride=xx,stripe-width=xx options. However my version ...
1
vote
1answer
324 views

Correct VHDX sector size in Hyper-V enviroment for a RAID array

What is the correct sector size (which available in Powershell as options, when creating a new vhdx) for RAID10 array with default stripe size? I am using LSI 9271-4i controller and 4x Seagate ...
3
votes
2answers
143 views

Switch disks between array controllers

I have an HP ProLiant ML 350 G5, which has an HP Smart Array E200i/128 BBWC Controller embedded. This controller manages two arrays (each with three 72 GB disks in RAID 5) This controller has ...
4
votes
1answer
448 views

How to access SMART attributes when using RAID with a Dell Perc 4e (LSI)

I can't easily shut down this windows server, so I'd like 'online' solutions. I tried the following unsuccessfully: Seatools Enterprise: caused a BSOD smartmontools: scan only showed virtaul RAID ...
0
votes
2answers
249 views

Display HP RAID logical and physical drives sizes in megabytes

It does not seem possible to show more precises logical and physical drives sizes using hpacucli. For example, below I can only see sizes in TB and I cannot figure out how to display them in MB. ...
0
votes
3answers
413 views

Diagnosing disk health with smartctl

How do you determine if a disk has problems using smartctl? I have an Ubuntu 12.04 server using software RAID1, which became completely unresponsive. I rebooted, and it hung at boot with the message ...
0
votes
0answers
82 views

dmraid lists disk as “spare”, even though it was part of the array

It was setup as a RAID5, 4 disk array of /dev/sdc -> /dev/sdf. sdf failed, leaving the array in a degraded but operational state. A misguided attempt to restore the array led to one of the working ...
-5
votes
2answers
73 views

RAID Level - minimum number of drives for RAID 10 [closed]

I tried a sizing tool for my database and i got the following recommendations: [2x RAID 1/0 drives for Installation (I)] [2x RAID 1/0 drives for Transaction Log (L)] [2x RAID 1/0 drives for TempDB ...
-5
votes
2answers
150 views

Drive fault was asserted DELL [closed]

i have a DELL PowerEdge 2950 Server whit raid for 3 HDD. A friend whit a HP Proliant server which has broken, come to my help, to save information from the hard drive only had. When i put on my server ...
1
vote
0answers
237 views

running commands on physical drives on different backplane with megacli

So when I run "MegaCli64 -PDlist -aALL -NoLog | egrep 'Slot|state|Inquiry|Enclosure'" to grab a list of disks and their status. I can see a total of 36 disks. The issue is that they have the same slot ...
0
votes
2answers
47 views

Can I add a disk outside raid?

CentOS 6.5, Software RAID1 with 2 x 160GB As I'm running out of disk space, I want to add a third disk (1TB) that will be used for non-critical data. How can I add a extra sata disk to the OS ...
1
vote
0answers
158 views

Why was the replacement drive for failed drive in RAID 1 (linux software raid) was added as a spare?

I have a two drive linux software raid 1 for a server. There are two raid devices. (Boot (md0) & OS (md1)) Last week one of the drives failed so i ordered a new one. Today i shutdown the server, ...
-3
votes
1answer
54 views

Xen doesn't boot after install [closed]

I tried to setup Xen by the instruction released on the site of my hoster. I installed Xen, completed RAID setup as it is told in the instruction. Rebooted and succesfully connected to Xen from ...
1
vote
1answer
144 views

PowerEdge 2850 boot issue due to lost raid config

I have an older dell PowerEdge 2850 that has a boot issue when the server boots it comes up with the error pxe- e53 no boot filename received. I believe the raid card and memory where pulled and as ...
1
vote
1answer
325 views

Areca ARC 1261ML only sees 2TB on 4TB Disks

I recently acquired a Supermicro Box with a Areca ARC 1261 ML. I have installed 16 X Seagate ST4000VN000-1H4168 (4TB Drives). The ARC 1261ML controller only sees 2TB of usable space on the 4TB drive. ...
2
votes
0answers
92 views

RAID1 disks “forked”, now duplicate

I have got a server hosted by OVH, which is configured to have a soft RAID1 array, /dev/md0, that holds a LVM PV. There is another /dev/md1 array, which was supposed to be the /boot, but which is ...
0
votes
1answer
114 views

Are there performance or reliability concerns when spanning an LVM partition across multiple 2TB RAID virtual disks?

I'm preparing a Dell R520 PowerEdge server with 8x 1TB disks as a data archive/warehouse (file, RDBMS, NoSQL) server. Out of the box, the PERC H710P RAID controller was configured with 3x 2TB RAID6 ...
0
votes
0answers
56 views

Raid partitions not listed in /dev

I've assembled software raid1 /dev/md1, and made two partitions /dev/md1p1 and /dev/md1p2. Now even after reboot I can't see these two in /dev. Why? (udev service is running) #fdisk /dev/md1 ...
0
votes
1answer
69 views

Issue rebuilding raid5 with 3ware controller

I have a degraded array with 8 disks. Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy ------------------------------------------------------------------------------ u0 ...
3
votes
2answers
1k views

What does “single-bit ECC errors were detected on the RAID controller” mean?

I have a Dell T7600 with a Perc H710P RAID controller and 4 attached 3TB drives. Over the past few months the RAID controller has been intermittently reporting errors on boot: "no boot device found", ...
0
votes
3answers
86 views

Partitioning & RAID recommendation for a server with 3 disks

I'm installing a server machine (intended to run Debian GNU/Linux) which, among other things, is to be used for backups of our code. Now, I don't need all of the contents of the HDD to be ...
0
votes
0answers
49 views

Which RAID C600 Upgrade Keys for S2600CP4 Intel server board to enable SAS features

I need RAID C600 Upgrade Keys for S2600CP4 Intel Server Board to enable SAS features. I am not sure which one shall I use: RKSAS8 or RKSATA4R5?
-1
votes
1answer
146 views

How to replace NVRAM battery in BlueArc storage?

The RAID/NVRAM battery on a BlueArc Mercury storage host is located in the front of the storage head, and can be replaced without down time. From what I can gather, after battery change, I have to ...
0
votes
1answer
72 views

Error at partitioning disk

I am struggling to install debian squeeze (64 bit) OS in the system which is having RAID 1. While partitioning the drive, It says an error Operation not permitted during write on /dev/md126 . I am ...
3
votes
1answer
118 views

Multiple Servers, Multiple Drive Failure within 12 hours?

In the IT world I just won the Lottery Twice.... Today we had a hard drive fail in a raid array. A few hours later we had another drive fail on a different server.... We started checking all the ...
0
votes
0answers
53 views

ML310 Gen8 SATA Controller losing settings

We have purchased a couple of ML310 Gen8 with Sata Drives. They have both lost their raid controller setting. We just have to go back in and set the drive back to the array and all is fine. Anyone ...
1
vote
1answer
97 views

Hard disk is detecting as read only

I am installing Debian Squeeze 2.6.32 64 bit OS in IBM System x3250 M4. This system is already having built in RAID. After enable the RAID, I have started to install the Debian Squeeze 2.6.32 64 bit ...
1
vote
0answers
49 views

I forget to record the physical disk sequence for MegaRAID before transfer. Is there any way to recover.

I was so careless when I send my server for repairing. I removed disks from chassis to protect the data, but I did not record the position sequence for each disk and my raid card failed to build RAID5 ...
1
vote
0answers
127 views

Need help recovering RAID 6 array

My CentOS 6.5 server had its primary drive fail the other day. Our hosting company replaced the primary drive and reinstalled the OS. The system is up and running, but the 15TB of RAID6 storage isn't ...
-1
votes
4answers
187 views

What are the chances of two disks in a RAID5 going out on the same day?

I have a Perc H710 configured as a RAID5 with 4 attached 3TB Seagate 7200rpm hard drives. Two months ago, I got these spurious errors that led me to believe the my controller was bad. I replaced the ...
2
votes
4answers
1k views

LSI RAID: Write cache policy affects read performance?

I have a server with a LSI MegaRAID SAS 9260-4i controller, RAID-5 with 3 x 2 TB disks. I did some performance testing (with iozone3) and the numbers show clearly that the write cache policy affects ...
0
votes
1answer
115 views

LSI Megaraid 150-6 as regular SATA controller

I have an old but reliable server board that does not have any SATA ports on it. Also i have LSI Megararaid 150-6 (with latest firmware) which i want to use as ordinary "dumb" SATA controller. I ...
3
votes
2answers
164 views

Can a 7200RPM drive transfer speed at a full 6 Gbit/s?

Many vendors sell 4GB SATA and Nearline SAS drives which spin at 7200RPM. The vendors will advertise a 6 Gbit/s interface with no mention of actual data transfer speed. I've had conversations with ...
0
votes
1answer
231 views

Install OpenSuse 13/Linux on Intel raid ESRT2 fails. SLES works

I have an Intel box with S2600GZ board. I have tried to install a few Linux distros and non can detect the ESRT2 raid. All distros claim "No disks found". My goal is to install OpenSuse 13. The only ...
1
vote
1answer
698 views

Proliant DL320G5P, Embedded RAID controller: Windows installation shows phisycal disks, not logical drive

I am installing Windows 2012R2 on Proliant DL320G5P, with the Embedded SATA RAID controller. I have 4 disks, with two different RAID 1 (mirror) arrays. I have a "strange" situation: Windows ...
1
vote
0answers
1k views

How to recover an mdadm array on Synology NAS with drive in “E” state?

Synology has a customized version the md driver and mdadm toolsets that adds a 'DriveError' flag to the rdev->flags structure in the kernel. Net effect - if you are unfortunate enough to get a array ...
0
votes
0answers
107 views

mdadm array fails to start at boot, bad superblock on component drive

At boot my mdadm raid5 array fails to start, saying that one of my disks (sdi) has a bad superblock. However, once I log in, I can start the array no problem with mdadm --assemble /dev/md0 ...
1
vote
3answers
191 views

SQL Server 2012 RAID Setup and Performance [closed]

At my company we are in the process of setting up a new SQL Server 2012 box. We have 6 physical drives with 3,000 gigs each. We are considering two different RAID configurations and are wondering ...
2
votes
1answer
2k views

HP Dynamic Smart Array B120i ESXi performance issue

One of our small offices was in need of a small server to perform certain tasks. Because the noise and size an of a regular server i went with the HP ProLiant Microserver Gen8 G1610T. Witch i expected ...
0
votes
1answer
619 views

Replacing a HP P410 RAID Card

I'm getting kernel panics and I'm suspecting it's the RAID card locking itself up based on the messages in the panic log. I'm not sure if it's really the card or not. When it boots back up, it says ...