Redundant array of independent/inexpensive disks; a technology which utilizes multiple disks to provide increased reliability, performance, and/or redundancy. Can be implemented either in software or with a hardware controller.

learn more… | top users | synonyms

0
votes
1answer
599 views

One 4TB hard drive or two 2TB in RAID 0 – which gives better performance? [closed]

I’m looking into getting a new Synology NAS and looking at these two options for hard drives: 2 bays: 1 x 4TB - file system (video, music, private cloud) 1 x 4TB - daily backup 4 bays: 2 x 2TB ...
1
vote
2answers
784 views

Fix Intel RAID0 array, one of disks has bad blocks

I've got an issue with a firmware Intel RAID0 array. It consists of 2 disks 500 GB each. The second disk has several bad sectors, and I can't remap or hide them (they are 8 LBAs or 4096 bytes). I ...
1
vote
1answer
65 views

recover data from a previously RAID 1 drive?

Normally it's a drive that fails, but in this case it was my motherboard (I think). System is completely dead. It was a Dell XPS420 with a Intel ICH7R Matrix RAID controller on the motherboard. ...
1
vote
0answers
372 views

chunk, ext4 stride and strip-width size for RAID level 1?

the man page for mdadm says: "[chunk] is only meaningful for RAID0, RAID4, RAID5, RAID6, and RAID10." i.e. it does not apply for raid1. even if you pass the value, it will say "ignoring chunk size" ...
0
votes
1answer
184 views

How to create bootable CentOS7 USB drive with FakeRAID drivers?

I have a few older servers that only have one available USB port, and no CD-ROM drives. I have successfully created a bootable thumb drive using dd to copy the CentOS-7-DVD isos to thumb drives, but I ...
1
vote
1answer
437 views

Replacing an Imminent-Failure Drive in a RAID-0 with Clone

The RAID-0 in question is run by an Intel RAID controller in a Gigabyte Z77X-D3H. It is a 2x320GB RAID-0, comprised of two different model drives. The working one is a 320GB Western Digital (whose ...
3
votes
3answers
55 views

Feasible to have a RAID of RAIDs

Having a RAID can increase speeds and redundancy. Can a RAID be made using other RAIDs as "disks"? This could further increase performance and redundancy. How many levels can you go?
0
votes
0answers
37 views

Implement backup strategy in cloud with a slow connection (around 150 GB)

I want to implement a backup strategy based in cloud to prevent data lost by disasters. Scenario: Proliant Server ML350 1X136GB (Windows 2008 installation and applications) 1x136GB (Applications ...
1
vote
0answers
166 views

Alignment with RAID-6 (mdadm) + LUKS + XFS

What I want: I have a 4x4TB RAID-6 array with mdadm. I want the storage to be encrypted and plan on using LUKS. I will most probably use XFS as filesystem. I will add more disks to the array as ...
2
votes
1answer
50 views

Need application to run without root access

i try to build my local services system inhouse, and to thant i need to learn how i can give access to a single user with out type a root access when i do it, or i need to know how i can call the ...
2
votes
0answers
16 views

disable driver signature check while installing windows 7 [duplicate]

is there any possibility where i can disable the default driver signature check while WINDOWS 7 Instalation?. My problem is that: i had bought an asus mobo with inbuilt AMD raid card and i want to ...
0
votes
1answer
265 views

Install grub raid1 & lvm

I have installed an Ubuntu Linux on a machine where there was a RHEL (from Dell) At the end of the installation I got a message that GRUB2 could not be installed. So I booted into a Live Linux (from ...
1
vote
1answer
67 views

Recovering data on 20TB RAID 5 NAS, overwritten by 500gb RAID 1

I have a Linux gateway with 2 500gb drives in software RAID 1 for system. /dev/sda = RAID 1 /dev/sdb = RAID 1 /dev/sdc = RAID 5 (NAS 12 drives iSCSI, /home directories) While replacing sdb, weird ...
1
vote
0answers
55 views

Degraded RAID 5 array, can't add replacement drive

So I've had two drives that have been marked as faulty spares in my RAID, I've removed them then I tried to --force assemble the RAID but this came up - mdadm: /dev/md0 assembled from 2 drives and 1 ...
0
votes
1answer
310 views

ZFS (RAID-Z1) or “hardware” (RAID 5) on Linux system?

I have never put together a RAID array before, but i think i understand the concepts behind most raid types from my reading. Ordering three 3TB drives (WD red) to use in a xeon e3-1231 v3, 16GB non-...
0
votes
0answers
372 views

RAID 0 now showing as “unallocated”

I have a 6TB RAID 0 consisting of 2x3TB WD Red drives. It's been working fine but recently I went on my PC (which was still turned on and had been for a few weeks) and the whole partition was showing ...
0
votes
1answer
74 views

mdadm build legacy array on boot

I have RAID0 that was built using windows dynamic disk. I've read that this is a legacy array and can be assembled using build in mdadm. I've gotten the array to build and mount using the following ...
0
votes
1answer
52 views

Multiple PCIe Controllers

I am trying to exceed the 6Gb/s barrier of SATA3 I want to use RAID 0 on multiple SSD's and I am trying to come up with a (relatively inexpensive solution) I have 40 available PCIe lanes /16 are being ...
1
vote
1answer
95 views

Create Degraded RAID 1 in Windows 7

Question is simple. Can one create a degraded RAID 1 in Windows 7? In other words specific to a hypothetical situation, can I have a backup drive with backup data on it, then buy a second backup ...
1
vote
0answers
166 views

how to mount a XFS filesystem in LVM volume with RAID0 having a bad disk?

I have a small NAS with two 500GB disks in a RAID0 (JBOD) setup. (I know, I know, big mistake... as you will see...) Now, one of the disks started to fail (Murphy is always right, isn't he...) I ...
0
votes
4answers
743 views

How do you back up a RAID 5 server?

I see many information on how to back up single drive, transfer information, or even use the dd command. Originally, I had a 1 disk server, and when I migrated it to a higher end server, I went ahead ...
2
votes
1answer
26 views

re-assemble out-of-date raid5?

I need help with my raid5 after it crashed through bad sectors. Previously I could re-assemble it with # mdadm --assemble --force -v /dev/md0 /dev/sde1 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1 but ...
3
votes
1answer
226 views

gparted live CD won't move/resize unmounted partition

GParted live will not allow me to resize/move partition /dev/sdb5: No other windows (such as error dialogs) appear. The partition is part of a RAID device, but I stopped all raid devices before ...
0
votes
5answers
244 views

Are RAID 5 systems suitable for larger disk sizes? [closed]

Why is it generally considered that RAID 5 systems are not suitable for larger disk sizes? Is the same true for RAID 6? Reference: http://www.zdnet.com/article/why-raid-5-stops-working-in-2009/
0
votes
1answer
32 views

Mirror new HDD with old (raid 0) HDDs

So after fighting every day with my slow 3TBx2 Raided HDDs I decided to get a new one that's just 4TB (as I don't use more than 2TB currently). It's a WD Black HDD that looks really promising. There'...
1
vote
1answer
626 views

Intel Rapid Storage Technology made HDD dissapear

Recently my laptop stopped booting windows. When I turned it on, Intel Rapid Storage Technology 12.7.0.1936 window showed up and said, that one of my SSD volume is disabled and asked me to press CTRL+...
0
votes
1answer
53 views

Keep linux software RAID 1 after OS change

Currently I've configured software RAID 1 on ubuntu machine. However I am planning to add SSD drive just for the OS and keep my main 2 HDD for the storage with RAID. The question is, can I put now ...
1
vote
0answers
178 views

Bad Magic Number in Superblock or Not a Block Device

I'm having some real problems getting a drive to have any working partitions on it at all. The drive is a 2Tb one from a NAS that I'm trying to repair. I've written zeros to the first 77Gb of the ...
1
vote
0answers
20 views

Intel RST turned a disk off

I have an Asus ROG laptop and I got a BSOD while I was working and then after the restart, one of my partitions disappeared. This used to show two disks but it only shows 1 disk and the cd drive. ...
0
votes
0answers
99 views

Can't install Windows 7 x64 on SSD drive

The title explains my whole problem, I had Windows 7 installed multiple times on the same SSD drive. But when I attempted to reinstall it last night it gives me this error(translated from dutch): We ...
1
vote
1answer
3k views

System went read-only suddenly

My web server (Linux, Debian Wheezy) has suddenly gone read-only, MySQL have crashed (but Apache didn't) - giving errors when pressing tab to complete file name as: bash: cannot create temp file ...
2
votes
1answer
85 views

RAID 0: how identical do the drives have to be?

I have a spare 1Tb. Seagate Barracuda HD, and I was planning on buying another one and creating a RAID 0 array using my motherboard's SATA controller... but I have a doubt: how "identical" do the two ...
2
votes
2answers
251 views

RAID 1 using three drives

Before you go say that RAID 1 mirrors one drive and cannot mirror twice, that's not what I mean. I have a WD Black 2 TB HDD and 2 WD Blue 1 TB HDD. The WD Black is to be the main drive, and ...
0
votes
1answer
300 views

How to force System Reserved to be created on the boot disk drive

I have machine with three disk drives - Disk 0 500 GB SSD - Disk 1 4TB Mechancial Drive - Disk 2 4TB Mechanical Driver I am installing windows 8.1 on this machine with SSD being the c:\ ...
0
votes
0answers
68 views

4T RAID 0 Partitioning issue

I am building a new workstation 1.2T 10K SAS X 4 for Win 7 Pro SP1 x64 I must use RAID 0 for this workstation. What I would like to have is C = 500G D = rest of spaces So BOIS based system with ...
0
votes
1answer
88 views

2x3tb vs 3x2tb RAID drives for home nas [closed]

2x3tb vs 3x2tb RAID drives for home nas What's more reliable if both of them cost the same money? 2x3tb in RAID 1 3x2tb in RAID 5 From my perspective removing one failed drive of 2tb is cheaper ...
3
votes
2answers
800 views

Create a Spanned drive with 3 external hard drives

I'm trying to create a merged drives from 3 externals drives (2*3Tb + 1 * 2Tb) on Windows. I went to diskmgmt.msc and tried to create a spanned drive, but i keep getting the error "Operation not ...
0
votes
0answers
55 views

cloning drives to correct RAID 10 failure

I don't type questions like this very often, so I apologize if I could have made it clearer. I have 4 HDD slots in which I had a RAID 10 array setup. It is a motherboard software RAID so clonezilla ...
1
vote
0answers
138 views

SSD's or HDD's in a LANcache?

I am building a LANcache for a lanparty that I'm organizing. We have about 80 visitors (pretty small LAN), but our uplink is limited to 100mb/s due to reasons and it's constantly saturated with game ...
1
vote
2answers
2k views

btrfs convert from raid1 to raid5

Is it possible to easily convert a btrfs raid1 to a raid5. I mean at the end of the day. Its really just two mirrored drives. So I would think this should be easy to do. I want to now have 3 3TB ...
-1
votes
1answer
42 views

Is there any reason to replace a failing disk in a raid10 before it has completely died?

My home server has four 4TB disks configured as a RAID10. I've gotten a few messages recently suggesting that I'm about to lose one of my disks: $ WARNING: Your hard drive is failing Device: /...
1
vote
0answers
158 views

SSD cache, SRT, Raid 0 : speeding up my C drive

I have a Z97 rig and I'm interested in speeding up my disk drives. This is my current setup: 1) 240GB SSD for main disk 2) 500GB hard drive for User Files 3) 120GB for photo editing (I move files ...
1
vote
1answer
61 views

Is a btrfs RAID1 mountable if the added device isn't available/offline/failed/degraded?

Assume I created a RAID1 with btrfs's functions (btrfs device and btrfs balance subcommands instead of mdadm) like so: btrfs device add /dev/sdxZ /dev/sdxY btrfs balance start -dconvert=raid1 -...
2
votes
1answer
3k views

How Do I Properly Disable Intel SRT & Remove the SSD Cache Drive?

I bought a Dell XPS 8700 which comes with a 2TB HDD paired with a 32GB SSD cache drive using Intel's SRT technology. I'd like to install a new 512GB SSD for the OS and use the separate 2TB HDD as a ...
0
votes
1answer
121 views

Intel Software Raid: Downgrade from RAID10 to RAID 1

My configuration Windows 8.1 Asus Z87I Pro (Rev C2) 4x WD Red 3TB, set up as RAID10 in the Intel tool / EFI My target I want to remove 2 of the HDDs permanently from the RAID because I don't ...
0
votes
1answer
548 views

Low speed on an 850 Pro RAID-0 array

I recently bought two Samsung 850 Pro 256GB SSDs in order to replace an old SSD and build a RAID-0 array on my PC. So, the configuration of the PC is the following: CPU: Intel(R) Core(TM) i7 CPU X ...
0
votes
0answers
67 views

Should I replace HDD in raid array every N years even if disks aren't corrupt?

Typical scenario: I made a raid 1 array out of 2 disks, that contains data I wouldn't like to lose. I found that average life-time of HDD (rotating drive) is 3 - 5 years. Does it mean that if the ...
0
votes
1answer
270 views

suse linux installatation on HP Gen9 server

I am unable to install SUSE Enterprise Server 11.0 with sp3 on HP gen9 server. It's unable to recognize the storage. The raid controller is p440ar. It had tried installing with HP ProLiant Gen9 ...
0
votes
1answer
24 views

Error RAID1 but can't seem to find where the error is?

I'm having trouble figuring out where the problem is. I'm seeing my two drives... I removed a failed drive and installed an empty one. Thought I added it to the raid and it said it was rebuilding. ...
0
votes
0answers
102 views

Removed drive from NAS not recognized when plugged in via USB

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 ...