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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4
votes
2answers
719 views

megaraid: Logical Drives at different RAID levels

I am currently using a SuperMicro machine that has an on-board LSI 2208 controller (MegaRAID class). I want to create a single array from two drives and then carve that up into: one RAID1 100GB ...
1
vote
0answers
268 views

Resize a RAID 5 Partition

I'm moving my VG to a RAID, i have 3 disk 600GB, the VG is in the partition /dev/sdc2 /dev/sdc1 1G type linux <-- Boot partition /dev/sdc2 599G type Linux LVM One disk have the VG and with the ...
1
vote
4answers
306 views

RAID Battery and UPS

I have a server with a UPS, life on battery is around 20-30mins, the server has a 2405/128MB without BBU, I am just confused as to do I really need a BBU card? Surely if the UPS is working, during a ...
-4
votes
1answer
36 views

Good way to get HDD in a large logical disk. *7 Discs of different sizes [closed]

Basically I would like to have one large logical disk. Data security is important, but not critially. Typically I would like something like 1st prize: Raid 5 2nd prize: Loosing all data on failed ...
0
votes
1answer
143 views

Convert a LVM into a RAID 5

I have 3 disk (600GB) only one in use. is possible convert into a RAID5 without need a external disk my system is: Ubuntu 12.04.1 LTS 3 x SAS 600GB Hitachi (only 1 in use in a VG)
2
votes
2answers
531 views

How to use SAS expanders with Adaptec 2405 Raid Card

I have a server with Adaptec 2405 RAID card. I have 4 hard drives attached to it. I want to add 4 more. Adaptec site says 2405 can handle up to 128 hard drives with SAS expanders. It's not clear to me ...
-1
votes
1answer
3k views

Adaptec Raid Failed

i have a Supermicro Server with this RAID Controller. The server works fine, but for cleaning purposes unplug the disks for some time. After that, the controller shows an error and the server won't ...
1
vote
3answers
4k views

Disk 0 Failed in RAID-1 on Dell PE2950

I'm sure I probably know the answer to this question, and am just looking for some reassurance! We have a Dell PE2950 with a RAID-1 (2 x 300GB) for the OS and a RAID-5 (4 x 300GB) housing some SQL ...
10
votes
1answer
18k views

How exactly does a SAS SFF-8087 breakout cable work? + RAID/connection questions

Please let me know if my question does not makes any sense as I am not sure if I am interpreting it correctly from my thoughts due to my lack of technical knowledge on this. If I am using a ...
1
vote
2answers
88 views

Install RAID1 without Second Hard Drive?

HP P410i Raid Card. I am waiting for a second hard drive to arrive. Is it possible to start with 1 hard drive and enable RAID1 without loosing data when the second drive is installed?
0
votes
1answer
70 views

Intel RAID controlers and CPU processor [closed]

Looking at the configuration guide for the Intel Server Chassis / Intel Server Board dating "Junly 2012"(sic!), in the section of "Production RAID Controllers" it mentions "Supported in Single ...
-2
votes
2answers
82 views

Centos RAID1 installation

I have installed Centos 6.2 with RAID1 support, after installation I have checked RAID1 by removing one by one Hard disk, Os booted and worked. So after I created new users, installed LAMP, ftp and ...
3
votes
2answers
2k views

How to get notified of mdadm RAID problems?

I am running Ubuntu 12.04 LTS. Yesterday I found a message in my mailbox saying that my server was shut down. I proceeded to reboot the system, but it didn't come up after many minutes, and I didn't ...
1
vote
1answer
463 views

How do I rebuild my software RAID1 array after a drive replacement?

So I have 1and1 dedicated host with RAID 1 setup. One of the drive went bad, and they had just replaced it with a good one. Now I need to the build, but I'm not sure which drive is the old one, and ...
-1
votes
1answer
167 views

boot a non-raid disk on a server

I have a HP ML310e that I am trying to recover data off. It has a RAID 10 array and I am wanting to boot a non-raid hard drive on the server. I can't see this disk in the bios, so I can't boot from ...
0
votes
2answers
1k views

Increase the size of software RAID 10

Currently I have 8 disks each of size 32G forming a RAID 10. Now, I want to increase the size of this RAID by adding extra disks. This is a production device so there is already critical data in the ...
2
votes
2answers
888 views

Hybrid RAID with LVM + mdadm

So I've been looking Synology and their idea of Hybrid RAID to make mixed drive RAID arrays both fault tolerant and efficient. So, I'm testing an idea (performance isn't a concern here), with a mixed ...
2
votes
2answers
4k views

Can I safely remove all disks of a synology NAS while its turned off?

I have a Synology 4-bay NAS (RS409RP+) with a RAID 5 installed on 4 hard disks. Now I need to upgrade the NAS to a bigger set of hard disks, and because these hard disks are 3TB each, I cannot use the ...
0
votes
2answers
744 views

RAID 1 hard disks errors, file system is not mounting

I have a Server with 2 HDDs in soft RAID 1, the OS is Debian Wheezy. After some database testing, the file system has gone to read-only mode, after which I have rebooted the machine. The server is not ...
1
vote
1answer
455 views

Managing PERC 6/i and P800 in the same system under CentOS

I have a CentOS/Xen VM server running on a PE T710 with a PERC 6/i, which has a 6 disk RAID 10 + 1 hot spare. The chassis only holds 8 3.5" disks, and so I'm looking for an aftermarket (used/eBay) ...
1
vote
1answer
130 views

IBM serveraid problems

When I start my server serveraid gives me this error: not responding properly Error 00D0 any help would be appreciated. I can't find any information on this. Where can I go to get more information on ...
3
votes
3answers
721 views

What is the best way to copy 9TB of data to multiple external drives, sequentially?

The data is currently stored in a 9TB RAID array, with many users having many files and directories. We'd like to back it up to five 2TB external hard drives, but since we only have one free USB port, ...
-1
votes
1answer
682 views

How to check 3ware raid controller's health?

I have a 3ware controller and I would like to check the health of the drives and the raid itself. I found this blog: http://www.cyberciti.biz/faq/linux-check-health-of-3ware-raid-array/ but I ...
0
votes
0answers
111 views

Reconfigure from Raid0 to Raid1, is it possible?

currently I have Fujitsu tx140 s1p servers, one Tower and one Rack. They are both running with the same hardware, configures the same way, so I'll just ask one Q for both. They have an motherboard ...
0
votes
0answers
352 views

P2V Conversion When Existing System Is On A Raid Array

I asked this at Superuser but received negative votes so here I am. I want to know if it is possible to Virtualize a server that runs on top of a RAID1 configuration. I want to migrate the virtual ...
4
votes
2answers
1k views

Maintenance (TRIM) of SSDs in HW RAIDs

I have 2 ARECA 8040 HW-RAIDs, with 8 SSDs each. One is RAID10 with Intel 520 SSDs, the second is RAID5 with Samsung 840 SSDs. Both are connected to the Server with one shared LSI Logic / Symbios Logic ...
0
votes
0answers
118 views

why cant I set the correct partition size in fdisk

I am currently attempting to setup a raid array. At this point in time I am setting up partitions of the same size on each hard drive that I would like to use in the array, although when I used fdisk ...
1
vote
1answer
280 views

Why is my synchronized I/O so bad compared to direct?

I have two 3TB disks in a software RAID 1 setup and the host OS is 64bit Debian wheezy. Issuing: dd if=/dev/zero of=test bs=64k count=3k oflag=direct && rm test Yields: 201326592 bytes ...
0
votes
2answers
298 views

How do I resize full root or swap partitions in RAID?

It all began a couple weeks ago: When I try to use vi I get "E297: Write error in swap file $ echo "test" > test produces -bash: echo: write error: No space left on device My bash history is ...
0
votes
1answer
548 views

“LV Status NOT available” after converting root from lvm2 to lvm2+raid1 (lvconvert --type raid1)

I just converted by lvm2 root filesystem from linear lvm2 (single HDD:sda) to lvm2 raid1 (using lvconvert -m1 --type raid1 /dev/ubuntu/root /dev/sdb5 command). But after this conversion I can't boot ...
1
vote
2answers
664 views

Dell PERC H700 and 8 disk slots : what are my options to increase disk fault tolerance?

We've got a Dell PowerEdge T510 which has 8 disk slots in the front. It is currently utilising 6 of these slots, and the disks are controlled by a PERC H700 controller. The disks are currently running ...
1
vote
1answer
124 views

Solaris not seeing FC volume

We recently replaced a failed controller in an AL connected RAID. I wasn't the one that replaced the controller, but apparently when the new controller was installed something weird happened with the ...
0
votes
4answers
226 views

High speed storage drive (over 8 GByte/s) [closed]

Looking for a windows based solution to create a high performance, 8 GB/s storage array. Either by striping together dozens of SSDs, or by create multiple RAID arrays and somehow pooling them ...
0
votes
1answer
275 views

Intel S5520UR and Raid activation key

If I add Raid Activation Key: AXXRAKSAS2 and Memory: AXXMINIDIMM512 To the S5520UR Intel motherboard, it enables: "enables full intelligent SAS HW RAID for the Intel Servers with a ...
-2
votes
1answer
65 views

detecting hrd drives on server without raid controller

I have a basic question. I have a server with 4 separate disk installed with ubuntu OS. The server does not seem to have raid controller. Is there a way to work with all the 4 disks, that is mount ...
2
votes
1answer
100 views

Is my server toast?

Last night I received an e-mail from mdadm about the possible failure of two drives on my array. The raid array was set up as a 4 2TB drive raid5 with one hot spare. Is this system truly fried? Did ...
1
vote
1answer
695 views

Safely migrate from 3ware 9650SE-8LPML to a 3ware SAS 9750-8i?

I have a server with a potenially faulty 3ware 9650SE-8LPML. I can log in to the server but the interface keeps reseting causing the whole system to lock down for minutes. My host suspects its the ...
0
votes
3answers
4k views

Very poor performance on LUKS/LVM/RAID combination under Debian Squeeze

I have the following issue: I have an encrypted partition on a lvm on a plain partition on the hd. Now I craeted a RAID array to increase the performance. That means, that I have the following stack: ...
1
vote
1answer
924 views

Intel ESRT2 RAID array is not recognized by Debian

We have a new server here with an Intel Server Board S1200BTL and I'm trying to set up a RAID 1 for data storage. I have Debian 6 installed on an SSD, and two 2TB hard drives that are supposed to be ...
1
vote
1answer
1k views

Are RAID disks really universally unsupported for VMWare converter

I am preparing to virtualize our DC, which runs on SBS2008. We have eliminated the >2TB GPT disks and prepared some disk level backups with Acronis to use for the conversion. I plan to use the VMWare ...
1
vote
1answer
307 views

100% SSD usage Linux

Every 20-30 seconds my HDD usage goes to 100% (iostat). iotop is showing that [flush-8:0] is using 99% HDD during these times. In between HDD usage is 1-10%. iostat output: 04/22/2013 08:58:44 AM ...
-1
votes
3answers
467 views

Raid 0, Raid 1, Raid 5, Raid6, Raid 10 Read/Write performance? [duplicate]

Assume a single disk has a baseline of 1W & 1R performance, how does the different RAID configurations behave? My initial guess: Raid 0: 2W 2R Raid 1: 1W 2R Raid 5: ? ? Raid 6: ? ? Raid 10: ...
1
vote
1answer
2k views

HP SmartArray P212 disabled, cache module not attached

I have a DL180 G6 server with Smart Array P212 RAID controller. The server runs under Ubuntu. After an upgrade from Ubuntu 10.04 to 12.04 utility hpacucli (ver. 8.50-6.0) stopped working. The error ...
1
vote
2answers
3k views

Equallogic partitioning: pools, allocations, etc

I have some new budget coming up to buy an Equallogic PS6110xv. This unit has 24x600G disks and I'm looking at different ways of setting it up. The two primary uses will be VMs and MySQL. MySQL: ...
0
votes
1answer
921 views

LSI RAID not synchronizing

There is a HS22 Blade with RAID. I removed one of the mirrored disk, and used it for other, but now I'm inserting it back, but it doesn't sync from the working disk. cfggen shows the following: ...
2
votes
0answers
268 views

HP DL380 G7 RAID controller detecting bays incorrectly - port or mobo?

I've been passed a DL380 G7 which appears to work fine (all usual checks come back OK, Linux boots OK, LV creation is OK and disk access is OK) -- except the left hand four bays connected to port 1 of ...
0
votes
1answer
67 views

RAID Level Recommendation [closed]

I have just purchased the Dedicated server with the following specification. XEON 3.46GHZ 2 CPU 64GB RAM 6x300 GB Harddrive I wanted to know what RAID level should be installed with these ...
0
votes
2answers
840 views

High %wa in top on KVM host

I have a server running several KVM virtualized guests that's reporting a high %wa in top. The server hardware is as follows: 4x2TB in hardware RAID10 64GB RAM Dual E5-2620 top output % top - ...
1
vote
2answers
687 views

3Ware RAID 1 drive failed… replacement drive is slightly smaller. Do I have any options?

The picture says it all. One of the drives in a RAID-1 array failed and I had a replacement drive with the same model number ready. When I tried to rebuild the array using the web interface it fails ...
0
votes
1answer
225 views

Huge disk write speed difference between two different servers

I have two servers, with similar disks. The first server has 4x300GB Seagate Cheetah 15K.5 model nº ST3300655SS 3.5'' RAID 10. The second 4x300GB Seagate Savvio 15K.3 model nº ST9300653SS 2.5'' RAID ...