Questions tagged [raid5]
RAID (redundant array of independent disks, originally redundant array of inexpensive disks[1][2]) is a storage technology that combines multiple disk drive components into a logical unit. Data is distributed across the drives in one of several ways called "RAID levels", depending on what level of redundancy and performance (via parallel communication) is required. RAID 5 is a specific implementation.
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Which is better: RAID5 + 1 Hotspare / RAID6? [closed]
Just curious, I have 6 x 1TB 7200RPM Near Line SAS for my new server. I can either configure it as RAID5+1 Hot Spare or RAID6.
What should I choose?
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What counts as a 'large' raid 5 array?
A recent issue with a Buffalo TeraStation NAS here in my office has got me investigating Raid 5.
I've found a few different articles talking about the unsuitability of using raid 5 in large arrays, ...
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RAID5 on SmartArray P410i online resize
I have P410i+256M Cache without battery backup.
My RAID5 was build over 3*136GB disks, now all disks were replaced to a 3*300GB array.
How can I extend it to use the whole space?
HPacucli doesn't ...
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Recover RAID 5 data after created new array instead of re-using
Folks please help - I am a newb with a major headache at hand (perfect storm situation).
I have a 3 1tb hdd on my ubuntu 11.04 configured as software raid 5. The data had been copied weekly onto ...
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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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What are the main points to avoid RAID5 with SSD?
My understanding is that an SSD has a limited amount of writes. RAID5 performs many writes due to parity information across the drives. So reasoning states that RAID5 would kill and lower the ...
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Repurpose spare drive in HP ProLiant RAID 5 array
We have 8 300GB SAS drives in a RAID5 + Spare configuration. It seems data capacity planning came up a bit short and I need more disk space. Instead of replacing drives with 600 GB models, I would ...
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How do I move a Linux software RAID to a new machine?
I have a newly built machine with a fresh Gentoo Linux install and a software RAID 5 array from another machine (4 IDE disks connected to off-board PCI controllers). I've successfully moved the ...
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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 ...
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Slow write Performance with HP H240 HBA using internal Storage with Raid 5 SSD's
I am having a HP Proliant DL 160 Gen9 Server with a HP H240 Host Bus Adapter.
6x 1 TB Samsung SSD's configured in a raid 5 directly using the internal storage of the machine.
After installing a VM on ...
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logical drives on HP Smart Array P800 not recognized after rebooting
We had a Smart Array P800 configuration working fine (RAID5). Physically, we have a disk enclosure (like this) connected with a Linux Server. Here is what happened:
This server was accidentally ...
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Setup SunFire 440 Raid Configuration
How can I setup Internal Hard disk RAID5 configuration?
I have SunFire 440 machine with 4 internal hard disk. I have never worked on Sun systems except for now and I am exploring google for the above ...
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How many disks is too many in this RAID 5 configuration?
HP 2012i SAN,
7 disks in RAID 5 with 1 hot spare,
took several days to expand the volume from 5 to 7 300GB SAS drives.
Looking for suggestions about when and how I would determine that having 2 ...
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Easy to expand Linux software RAID 5 with XFS. Best practices?
I use my Ubuntu machine as a file server for Windows/Linux/Mac clients using a Samba share. I need it to be easily expandable by just adding more hard drives without having to move any data back and ...
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Is RAID5 more robust than RAID1
I am about to replace an old hardware RAID5 array with a Linux software RAID1 array. I was talking to a friend and he claimed that RAID5 was more robust than RAID1.
His claim was that with RAID5, on ...
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Raid 5 Hard disk corruption
I have got IBM x3650 M4 server. It is configured with Raid 5 & includes 4 SAS hard disk with capacity of 500 GB each.
Now the 2 Hard disk are showing as bad. So by replacing the 2 hard drives ...
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Windows Server Backup Error - Volumes Larger than 16.7TB cannot be protected?
I'm trying to use Windows Server Backup to backup a RAID array on my new server. But, when I do, I run into this error:
The server is running Windows Server 2012 R2 and the array in question is 20TB ...
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How do I replace a disk marked as removed from a linux md raid-5 array?
I had some recent computer issues and somehow one of my disks ended up not being recognized in my array anymore. It identifies fine, and both smart and some other disk checking utils all say its fine, ...
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How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
For a Dell R920 with 24 x 1.2TB disks (and 1TB RAM), I'm looking to set up a RAID 5 configuration for fast IO. The server will be used to host KVM VMs that will be reading/writing files of all sizes, ...
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Convert a Smart Array RAID5 array to a RAID6 (ADG) variant
I have an HP MicroServer (N36L) with a SmartArray P410 controller, a 512MB BBWC unit and four (4) 2TB disks connected. Three of those disks are configured as a single RAID5 array and one is left alone....
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RAID-5 or RAID-6 - is RAID-5 really that bad? [duplicate]
Possible Duplicate:
Which is better: RAID5 + 1 Hotspare / RAID6?
I need to decide myself between RAID5 and RAID6.
The servers have a hardware-RAID controller and 6 drives each.
The drives are ...
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Replacing a dead hard drive in RAID 5 with a different type
One of the drives failed in my server configured with RAID 5, and I can't find a exact replacement. From my understanding, RAID 5 supports drives with different sizes. Is this safe? Any ...
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Should I worry about the integrity of my linux software RAID5 after a crash or kernel panic?
I have a dual core Intel i5 Ubuntu Server 10.04 LTS system running kernel 2.6.32-22-server #33-Ubuntu SMP with three 1TB SATA hard drives set up in a RAID5 array using linux md devices. I have read ...
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Reusing Raid 5 Drive?
We have two servers (ML530 G2 and DL380G2) w/ identical HP 10K RPM SCSI drives w/ a raid 5. One is decommissioned and the other will be decommissioned shortly.
However, one of the drives on the ...
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How can I view Server 2008 Software RAID 5 Resync Progress?
Skipping over the pros/cons of RAID 5, I have a software RAID-5 array made from 3x 2TB disks. I started the sync and nearly 12 hours later the sync is still going. Is there any way that I can view the ...
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Growing a RAID5 using mdadm with multiple drives?
I have a RAID5 array that consists of 3, 2TB drives. I want to add 2 more drives. The tutorials involve adding a single drive to an array, such as this:
https://raid.wiki.kernel.org/index.php/Growing
...
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How do I stop and repair a RAID 5 array that has failed and has I/O pending?
The short version: I have a failed RAID 5 array which has a bunch of processes hung waiting on I/O operations on it; how can I recover from this?
The long version: Yesterday I noticed Samba access ...
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Why does a URE cause loss of array during RAID 5 rebuild?
From what I have read, RAID 5 is problematic with large disks becuase if a single disk fails, you are likely to have an unrecoverable read error while the array is being rebuilt. From what I can ...
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ZRAID1 pool size bigger than expected
I have 3x 4TB drives for a ZRAID1 config (single parity drive)
After running
zpool create data zraid1 sdb sdc sdd
I have a volume that's 10.9T in size, which is what I would expect from a stripe ...
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Proliant DL360 Raid5 Hot Swap Drive
I have a DL360 G5 running WinSrvr2003 with a 3 drive (72GB) SAS Raid 5 array on P400i controller. The single array has two partitions. (OS and a data store) Drive 2 has failed and is off line (Amber ...
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Running swap on RAID10 or RAID5?
In follow-up to this previous question (and it's excellent answer), I am curious to know if running swap on a RAID5 might not be better than on a RAID10.
My thinking is that you might lose a bit on ...
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RAID5 array Ready for Rebuild
I've inherited administration of a server with a RAID 5 array. We have a damaged database on the array that is just over half the allocated size, so makes recovery impossible.
I recently changed the ...
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Moving a RAID-5 array from a dead HP ML350 G5 to an HP DL380
We have an HP ML350 G5 with a 3x72GB RAID5 array that we were in the process of decommissioning. After shutting down the server and moving it, but prior to moving the data elsewhere, the server ...
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"Parity Initialization Status: In Progress" for long time
Two weeks ago I installed 6 new hard disks (HP 500GB 6G 7.2K SFF 2.5-inch 2-ports SAS DualPort Midline, 507610-B21)
in a "HP DL 380 G5" with a "Smart Array P400" (RAM Firmware Revision 2.08, ROM ...
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Raid 5 rebuilding epic fail
Someone has asked me to rebuild a faulty raid 5 on a 3ware raid controller. I have 3 drives, all of them is 160 GB. I've gone through the steps,
ie selected the degraded array unit, and then gone over ...
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How to recover from RAID 5
there are 5 disk-array. i've lost the data of one of them. How can i recover? I don't know where to start?
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Is 5MB/s a reasonable speed for Dell Software Raid Controller in Raid5
I have a new PowerEdge T320. Details are:
Intel Xeon E5-1410 @ 2.8 GHz
16GB
Windows Server 2008 r2 configured as Domain Controller
Dell PERC S110 Software Raid
4x 7200 rpm 1TB drives configured in ...
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What parameters to mdadm, to re-create md device with payload starting at 0x22000 position on backing storage?
I try to recover from mdadm raid disaster, which happened when moving from ubuntu server 10.04 to 12.04. I know the correct order of devices from dmesg log, but given this information, I still cannot ...
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Creating a raid5 array with 4 disks in Ubuntu is only giving me 3 active devices
When installing Ubuntu 18.04 LTS in a new machine, I'd like to create a RAID5 array.
I have 4 1TB disks available.
However, since Ubuntu can't boot into the RAID5 array, I'm having to use one of the ...
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RAID5 rescue with LVM2 running on it
I have a RAID5-array consisting out of 6 1TB drives. Recently with hardware changes i needed to recreate the raid to rewrite the bootloader on each drive.
Now the problem starts. Starting the Debian ...
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Repair HP SmartArray p410i
i have an HP proliant server and in the last 4 years i never had a single problem with it. but yesterday i found out that i cant remotely login to my server so i went over and found that one of three ...
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HP MSA60 complains that new drives are faulty
We got some replacement drives from HP PN 454273-001 1TB 7.2k drives. We put them into the msa. It completes rebuild but when we run the hp insight diagnostics tests. It comes back as read write error ...
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Extend RAID 5 to use unused space and add additional disks?
I am new to RAID. I want to extend an existing RAID 5.
The current setup is as follows:
Array A
unused space : 349956 MB
logical drive :1
total size 273GB
raid5
disk : /dev/cciss/c0d0
physical
1I:...
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Debian Squeeze with RAID 10 [closed]
I'm trying to do a fresh install of Debian Squeeze on a server and set it up with RAID 5, or RAID 10 if possible (4 disks). I'm having difficulty finding detailed instructions on how to do this. I'm ...