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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RAID1 very slow with LSI card and 2x Samsung EVO 850 drives

not sure if I'm checking it correctly, but here is what I have. Desktop, LSI 9260-8i card, see config below. 2x 500Gb Samsung 850 EVO drives. I also have Samsung 830 drive attached to motherboard ...
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1answer
38 views

Can you change raid type on an active server?

I was just dabbling with a few different raid types recently for some performance testing and I was hoping someone could answer this question for the sake of knowledge. Is it possible to change the ...
0
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1answer
27 views

Unable to access QNAP NAS

I have a QNAP TS-879U-RP that is 2.5 years old (Firmware 3.7.1 Build 20120614), installed with 8 HDD (Seagate ST3000DM001-9YN1CC4H). I am having trouble accessing it after an unscheduled shutdown due ...
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1answer
29 views

Ubuntu Server 14.04 TLS plus Hardware RAID

I have just completed hadrware installation of my new RAID server which will run with Ubuntu Server OS. I have installed Ubuntu Server OS and everything run seemingly without problems. However, I ...
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1answer
14 views

Removing RAID-Treating drives independently

I have a server with a 3ware Inc 9750 SAS2/SATA-II RAID PCIe controller. The server has a non-RAID disk for the OS and 4x1TB disks in RAID-5 to store data. For reasons that have more to do with ...
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2answers
2k views

Linux-on-Linux KVM: Which filesystem should I use for guest and host?

I'm in the process on playing around with KVM and setting up a linux on a linux-server, so I can reboot the (guest)server encrypt the rootFS of the guest without having to do initramfs-tricks to get ...
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0answers
19 views

I want to add SSD's to my server's, can I do this with RAID failover?

Just as the title suggests, is it possible for me to pull two mirrored SAS drives add two SSD's into a RAID1 configuration, pull the old drives, and then add two more SSD's? A quick Google search ...
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3answers
6k views

Is it possible to reboot a Linux OS without rebooting the hardware?

Is there a way to reboot a Linux system (Debian in particular) without rebooting the hardware? I have a RAID controller that takes a bit to get itself running before the OS starts up, and I would ...
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1answer
40 views

What are the Pros & Cons of Software RAID vs Hardware RAID of 4xSSD(512Gig) in RAID10?

I'm getting this server: Supermicro SuperServer 6018R-TDW It comes with this motherboard: Supermicro X10DDW-i I've decided going with 4xSSD(512Gb) in a RAID10. My server is busy with a demanding ...
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7answers
12k views

RAID-5: Two disks failed simultaneously?

We have a Dell PowerEdge T410 server running CentOS, with a RAID-5 array containing 5 Seagate Barracuda 3 TB SATA disks. Yesterday the system crashed (I don't know how exactly and I don't have any ...
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0answers
24 views

Deploying Production Linux Servers on hard drives [on hold]

When deploy Linux servers how would your partition the drivers within servers that use mySQL, LDAP, storage, etc.? Do you have a separate RAID array in RAID 1 with the Linux OS on it then have a ...
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3answers
838 views

What are the pros & cons of 4xSSD(512Gig) in a RAID10 vs. 2xSSD(1Tb) no RAID?

Lots of read and write operations that my current setup of 4xSAS15k drives in RAID10 is having made me think of a new fast storage. My server is busy with a demanding database, lots of pages, php ...
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1answer
1k views

How to install Windows 2012 on Dell server with S110 RAID?

I have a Dell server that has a S110 software RAID 1 mirror for the boot disks. When I run the Windows 2012 installer, no drives are found. I searched Dell for drivers but the only one I found for ...
2
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1answer
20 views

HP Server Gen8 Mixed RAID and/or Pass Through

Hello All and thank you in advance for your assistance, I'm considering several HP Gen8 Server models (e.g. DL*e series) for use with WS12R2E. For us, cost savings using a mix of SSD/HDD will likely ...
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2answers
36 views

Is it possible to use Dell PERC H710 on a Dell R710/R610 server?

Dell ships R710 with older RAID card H700 which has LSI 2108 chip and ships R720 with H710 card which has LSI 2208 chip. LSI 2208 is much better with SSDs in terms of performance. I was wondering if ...
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2answers
2k views

How to create Raid 10 with megacli

I have OpenFiler storage server. Without installing Windows and MSM, I want to create raid10 array from disks 2 to 21. I have already successfully installed MegaCli to OpenFiler but I'm stuck in ...
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3answers
311 views

How do I monitor RAID status when using an external eSATA RAID5 SATA port multiplier?

I am using an external eSATA device which takes 5 SATA drives and presents them as one large HW RAID5 to linux (ubuntu). It uses a SiI3726 chipset. Linux sees and handles the sata device just fine, ...
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1answer
61 views

Restore lost RAID1 volume on Synology with mdam

Several days ago I found my DS412+ in fatal state. Volume1 crashed, system volume too. Moreover, Volume2 disappeared from the system! It looks like Volume1 had no free space and cannot transfer data ...
5
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1answer
164 views

Expand RAID array on HP Dynamic Smart Array B320i controller

I have a few HP ProLiant DL360e Gen8 servers that are equipped with the Dynamic Smart Array B320i RAID controller. One particular system was shipped with a single disk installed instead of a pair of ...
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0answers
17 views

Repairing a RAID5 array [migrated]

For a friend I'm trying to repair a RAID5 array, consisting of 3 2TB disks. After working perfectly for quite some time, the computer (running Debian) suddenly wouldn't boot anymore and got stuck at a ...
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2answers
5k 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 ...
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1answer
80 views

Ubuntu server becomes unresponsive on hard disk issues despite raid setup

I am running a server on Ubuntu 10.04.4 LTS (Linux xxxx 2.6.32-67-server #134-Ubuntu SMP Wed Sep 24 18:55:00 UTC 2014 x86_64 GNU/Linux) with two hard discs in a software raid 1. I repeatedly had the ...
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1answer
1k views

Recover mdadm RAID 10 array: listing all as spares

I'm a bad person and haven't backed up my RAID elsewhere. I now have a RAID10 array that won't assemble, and I'm hopeful I can save it. Here's the details: I have five hard drives set up as RAID10 ...
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2answers
567 views

Hard drives indication with controller MegaRAID SAS 9261-8i on HP Proliant DL320e Gen8. Is it possible?

Give me advice, please. My situation: There're the server HP ProLiant DL320e Gen8 and MegaRAID SAS 9261-8i RAID Controller. I installed Controller into server and I reconnected Mini-SAS cord from ...
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2answers
63 views

RAID 10 Stripe Size for XenServer

Below is our current server configuration. In a few weeks I will be simulating a disaster recovery by installing 5 new disks (1 hot spare) and restoring all VMs from the backups. Will I gain anything ...
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1answer
13 views

Issue accessing drive from RAID array via USB caddy

I'm having a problem accessing the data from a drive that was in my NAS but is now plugged in via a USB caddy. This drive was not in a RAID array as it was a volume with a single disk. Although it ...
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2answers
33 views

Does ZFS in mirror mode double vdev read performance?

I'm not able to find a clear yes/no answer to this simple question: does using ZFS in mirror mode double the read performance of the underlying vdevs? This applies to either individual requests or ...
2
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1answer
1k views

IBM ServerRaid lost Raid-5 configuration

I have an IBM server x3400 with 8 drives divided into two arrays. After reboot, ServerRaid lost the configuration of the Raid-5 array. The 6 drives that used to be part of this array are there, but it ...
18
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6answers
1k views

Should I 'run in' one disk of a new RAID 1 pair to decrease the chance of a similar failure time?

I'm setting up a RAID1 array of two new 4TB hard drives. I heard somewhere previously, that making a RAID1 array of new identical hard drives bought at the same time, increased the chance that they ...
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1answer
18 views

mdadm: drive replacement shows up as spare and refuses to sync

Prelude I had the following devices in my /dev/md0 RAID 6: /dev/sd[abcdef] The following drives were also present, unrelated to the RAID: /dev/sd[gh] The following drives were part of a card reader ...
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1answer
25 views

Should I be concerned by frequent RAID warning message (unexpected sense - command aborted)?

I have a Fujitsu host (PRIMERGY RX300 S6) running Windows Server 2008 R2 and Hyper-V (Version 6.1) with two virtual servers (one Windows Server 2008 R2 and one Windows Server 2012). Our 25 employees ...
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1answer
286 views

RAID disk not booting

my hosting facility replaced disk /dev/sda for me and I've added it to the RAID via sgdisk -R /dev/sda /dev/sdb mdadm /dev/md0 -a /dev/sda1 mdadm /dev/md1 -a /dev/sda2 mdadm /dev/md2 -a /dev/sda3 ...
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6answers
3k views

Why is RAID 1+6 not a more common layout?

Why are the nested RAID levels 1+5 or 1+6 almost unheard of? The nested RAID levels Wikipedia article is currently missing their sections. I don't understand why they are not more common than RAID ...
2
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1answer
2k views

How to get email alert if one of raid 1 disks fails?

I need to know how can I get email alert if one of raid 1 disks fail to work/crashes. I have CentOS 6.4 64bits, software raid. I did some mistake folowing this tutorial, because it was a bottom note ...
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1answer
43 views

ThinkServer RD440 raid mess

Does anybody have experience dealing with raid config on these new Thinkpad servers? My problem is the following: In order to be able boot this server I must put the drives to RAID1 to create an SCM ...
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2answers
62 views

Server raid doesn't boot in the morning

We have a HP Proliant ML350 G6 with integrated sas raid controller. Since 3 days the server starts up in the morning without this raid. All othe HDDs / SDDs are ok. We did install the ServicePack ...
2
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1answer
140 views

ZFS - zpool replace never finishes

I have a 5 x 3TB raidz1 array on a ubuntu 14.04.1 server. Last month, one of the drives died (audible clicking). I was able to replace the drive with zpool replace RAID <dead drive> <new ...
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1answer
51 views

Best span size for 12 x 2TB drives in RAID10

We have just taken delivery of a new JBOD chassis, with 14 x 2TB NL-SAS drives - 2 have already been earmarked for enclosure spares, so we have 12 drives available. I have several options for setting ...
21
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8answers
3k views

Do RAID controllers commonly have SATA drive brand compatibility issues?

We've struggled with the RAID controller in our database server, a Lenovo ThinkServer RD120. It is a rebranded Adaptec that Lenovo / IBM dubs the ServeRAID 8k. We have patched this ServeRAID 8k up to ...
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1answer
897 views

RAID1 on existing CentOS6 Install

I have two 500GB hard drives in my server. Currently, there is no RAID configured, but CentOS6 is installed (as a bare install for now). Is it possible to set up a software RAID-1 so that both drives ...
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1answer
14 views

How to rebuild Raid arrays after booting to a live cd?

Problem: Botched kernel upgrade left me with an unbootable system (don't ask me how it also made my backup kernel unbootable) where boot and root are on mdadm raid 1 arrays (with metadata 1.0/1.2 ...
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1answer
1k views

Resize openSUSE 12.3 GPT ext4 partitions in a RAID1 disk array

I have a software raid configured (/dev/md2) which has assigned the partitions sda3 and sdb3 from two 3TB disks (sda and sdb). The partition types are GPT not LVM and file system is ext4. Now, the ...
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3answers
858 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 ...
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1answer
547 views

Cabling order on ProLiant DL180 G5 with SmartArray P800 and 3 x MSA 60 enclosures

For some reason I need to power up a system full of data without having any documentation about cabling. I have : 1x Proliant DL 180 G5 with P800 3x full loaded smart array 60 with probably 2 ...
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6answers
673 views

What is a good desktop RAID 5 card? [closed]

I have a small development environment and would like to run a RAID 5 configuration on the database server. I am aware of the performance and storage implications. I would like to find a recommended ...
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4answers
8k views

How long does it take to rebuild a drive in a RAID 6?

I'm building a 7-disk RAID 6 array on a DELL MD3000 DAS box. My top priority is storage space, so I'd like to use 2TB drives -- but I'm worried about how long it will take to rebuild a failed disk. ...
2
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0answers
197 views

CentOS 7: GPT and software RAID 1 without 'biosboot' partition

I have a CentOS 6 server with software RAID1 (2x3TB): - sda # parted /dev/sda unit s print Model: ATA TOSHIBA DT01ACA3 (scsi) Disk /dev/sda: 5860533168s Sector size (logical/physical): 512B/4096B ...
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1answer
51 views

synology “disk groups” vs “volumes” clarification

Synology has introduced some interesting terminology with their products that is confusing (to someone used to traditional storage terminology). It appears that "volumes" on Synology is equivalent ...
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16 views

Partitions not recognized when installing Kubuntu 14.04 over complex RAID setup

I have three identical HDDs. Using a ROM utility, I configured the use of 90% of each of them as a RAID 5 array, and the other 10% as a RAID 0 array. That is, each array uses some area on all three ...
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7answers
3k views

Hot spare or extra parity drive in RAID array?

In a different question about configuring a RAID array, the author is building a RAID array with 8 drives. One answer suggests using 7 drives in RAID 5 with one left over as a hot spare. Since RAID 6 ...