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 ...
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1answer
66 views
Upgrade no raid server to raid
I have just learned that our PDC has a single drive with 2 partitions. I also know that this drive has bad blocks as recorded in the event log. What I would like to do is to convert this to a RAID ...
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2answers
122 views
/home partition stuck
I have development box with apache and userdir mod enabled.
Sometimes, entire /home partition becomes inaccessible.
Apache can't access scripts stored there, and I cant cd to /home nor ls its ...
2
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1answer
153 views
Building a Server to host Virtual Machines
I'm looking to put together a server with the base OS as Windows Server 2008 with Hyper V. This machine is a development box that will be hosting multiple VMs for development - test instances of ...
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1answer
139 views
moving mdraid from failed Buffalo NAS
I've been tasked with restoring a RAID from a failed Buffalo NAS. the NAS box has failed, but our understanding at this point is that the drives are still functioning. I believe that Buffalo's NAS was ...
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1answer
2k views
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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2answers
977 views
Software RAID 5 with different sized hard drives
Is it possible to use Linux software raid with different sized hard drives? What will happen?
Related
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2answers
634 views
How to recovery a 5TB raid 5
We have a 5TB raid 5 virtual disk cluster... I think the MBR got messed up and windows server 2003 no longer is able to view the contents of the virtual disk...
All the disk recovery software I have ...
4
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3answers
703 views
Which RAID level (5 or 0+1) should I use with 3 disks and why?
This is specifically for backup storage but, for informational purposes, I would like to know why would you chose one over the other?
Five minutes ago, I was not even aware that RAID 0+1 was an ...
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1answer
209 views
Raid5 Write cache - Nvidia motherboard
I can't figure out where to enable write-cache for nvida's raid. When using an intel motherboard with ICH10, there is a setting in the raid-software that enables write cache. I can't find that setting ...
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4answers
2k views
Linux Software RAID 5 Random Small Write Performance Abysmal - Reconfiguration Advice
I have 3 1 TB HDDs and 3 500 GB HDDs. Right now each size grouping is in a RAID 5, both of which are in an LVM volume group (with striped LVs).
I'm finding this to be too slow for my usage on small ...
1
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2answers
250 views
Moving Raid 5 ISA controller card + 4 Drives to another server while keeping data (not boot)
Due to server failure i would like to move a scsi ISA raid controler + 4 hard drives to another pc to recover the data inside them(raid 5). This raid isn´t a boot raid, there´s another raid holding ...
5
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3answers
2k views
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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1answer
216 views
Expanded 8TB RAID5 in mdadm only showing 3.5TB available
I had 3, 2TB disks in a RAID5 that I expanded to a 5, 2TB RAID5 (details here). This all went fine but when I went to the folder I have array mounted to (/var/media), it only show 3.5TB of space ...
2
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4answers
324 views
Which RAID format is best for data privacy during RMA?
So there are several RAID configurations to chose from, and I was wondering, eventually I expect some 25-45% of my drives may need to get swapped for a warranty repair. I know that there is no hope ...
3
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1answer
688 views
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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3answers
6k views
Can I recover a RAID 5 array if two drives have failed?
I have a Dell 2600 with 6 drives configured in a RAID 5 on a PERC 4 controller. 2 drives failed at the same time, and according to what I know a RAID 5 is recoverable if 1 drive fails. I'm not sure if ...
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1answer
1k views
How to make partition, raid5 and filesystem on 6x2TB WDC-drives in Linux
I'm getting confused by this "Advanced Format" (4KB sectors) talk of bigger (2TB) drives - and I am wondering about how I would resolve this if I'm building a new software (mdadm) RAID-5 array.
The ...
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2answers
2k views
mdadm: Swapping out small hard drives for bigger ones in a RAID5, How to partition?
So I got the gist of swapping out smaller hard drivers for bigger ones in an MDADM RAID5:
Fail and remove one drive.
mdadm -f /dev/md0 /dev/sdd1
mdadm -r /dev/md0 /dev/sdd1
Shutdown, swap the ...
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2answers
1k views
Intel Rapid Storage Technology - Raid5 is very slow
I build a computer with a raid5, using the motherboards raid controller (ASUS P7H57D-V EVO - intel Rapid Storage Technology). The read and write are however very slow, when using the raid controller ...
2
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1answer
838 views
mdadm raid5 failure. set wrong drive to faulty by accident
noticed a degraded raid where /proc/mdstats marked one device as down.
so i wanted to set the missing drive to faulty and reattach it.
somehow i got the wrong drive, leaving me with an unworking ...
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1answer
1k views
What is the procedure for reactivating a failed mdadm RAID5 array?
I have a three disk RAID5 array managed with mdadm, with an XFS filesystem on it. While I was using the machine, I noticed the machine suddenly become unresponsive (new programs wouldn't start, etc), ...
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1answer
1k views
Rebuilding RAID 5 in HP Proliant ML 370 G5 Server
One of our customer having HP Proliant ML370 G5 server with Windows 2003 SBS.That having 2*72GB(Single Port10K Serial SCSI) and 3*146GB(Dual port10K SAS) harddisks.Now that is going to full.I want to ...
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1answer
3k views
Software MDADM RAID 5 - Inactive MD0 showing
I have Linux (Crunchbang 8.10) set up with 3x1TB Hard drives set up as software RAID5.
It has recently suddenly stopped working.
cat /proc/mdstat shows the following:
Personalities : [linear] ...
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1answer
806 views
Does windows support hard drives larger than 2tb?
I have 6 x 500Gb drives formatted in raid 5. I have installed Windows Server 2003 R2 on 20Gb of this and want to format the rest as a backup drive (2.2Tb) is this possible?
I have found the following ...
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2answers
208 views
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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1answer
145 views
How to recover from RAID 5 [duplicate]
Possible Duplicate:
How to recover from RAID 5
there are 5 disk-array. i've lost the data of one of them. How can i recover?
5
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1answer
1k views
Is it safe to shutdown a machine while rebuilding/recovering/growing a RAID5 array that was built with mdadm
I have recently started a recovery on my 5-drive RAID in my file-server, and it says it'll take 691+ minutes to complete. I was wondering what would happen to the process if the machine lost power - ...
2
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1answer
464 views
How long should the initial creation of my RAID 5 Array take? This seems ridiculous
I'm building a raid 5 array with 3 1.5TB drives on CentOS 5.5 using mdadm. Everything seems to be working fine, except it's taking forever and I'm not sure if that's normal. It's going on 6 hours ...
3
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2answers
909 views
MDADM RAID 5 data recovery
Thanks for reading this thread and I thank you in advance for any help you can provide.
So this is what happened... I noticed that my MDADM RAID 5 array with drives ordered: /dev/sd[EFGHIABCDKJ]1 ...
2
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1answer
213 views
how do i fix progressively slower write speed in a raid 5?
We have a RHEL5 install on a machine with 5 Seagate 1 TB SAS disks. One has the OS and swap on it. The other four are in a hardware Raid 5 (mounted as /home) managed by a DELL Perc 6/i controller. ...
2
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2answers
2k views
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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6answers
1k views
understanding RAID Level 5
Just wanted to clear my understanding on RAID 5,
suppose we have 100 GB of data to be stored in SAN in RAID level 5, does the actual storage means 100 *5= 500 GB ?, or it is the 100 GB only which is ...
0
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1answer
231 views
Multiple RAID arrays in x346
I have an x346 server with 3 x RAID 5 73GB U320 HDD's running ESXi with 2 VM's on it.
1 VM is an exchange server running IIS and SQL2008. The other is an applications VM running IIS.
I have another ...
2
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1answer
367 views
Can I boot from a software RAID5 setup with linux?
I am planning the setup of a new NAS system, deciding if using Openfiler or something similar.
I've been checking some RAID cards, and thinking about hardware failure or substitution, and I have the ...
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3answers
1k views
How do I calculate the disk subsystem i/o capacity
I am trying to figure out the number of 8K page i/o capacity for a disk subsystem. The drives are SATA 7200 RPM - 4 drives in a RAID-5 configuration. I am not sure about the SCSI controller but the ...
0
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1answer
226 views
Older raid controllers in raid 5 vs. Jbod and SW raid
I'm in the fortunate position to have 6 Supermicro older VOD servers with the following config:
Supermicro 3U case, 3xPSU
Dual Xeon 3ghz P4 class cpu (5 years old.. havnt checked the exact type)
4GB ...
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1answer
1k views
HP DL380 RAID5 Mistake
I had drives fail in both logical drives on a server. When I replaced failed 146GB drive in Raid 5 array with four (4) 146GB drives. On reboot the Smart Array controller asked if I wanted to accept ...
6
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1answer
409 views
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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4answers
932 views
How do I Change a damaged Disk in a Raid 5 array
I have a server with a 4-drives Raid 5 array; one of the disks is damaged. All the disks are hot pluggable. My Question is, I want to replace the damaged disk with a new one, do I have to shutdown the ...
1
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1answer
272 views
Raid 5 and Power Supply damage?
Because I build a RAID 5 atm, I wanted to ask, what would happen if the server with a raid 5 in it (like 4-5 hdds) would have a power supply damage? Can I just switch the power supply and my data is ...
1
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2answers
130 views
Overnight SQL Server Full Backup taking 4x longer, everything else slower, RAID problem?
Sql Server on Windows Server 2008:
Overnight, fullbackups taking 7-10 hours instead of 1-3
transaction logs taking 4-5 minutes instead of 1 minute
Query optimization taking 3x longer
I'm feeling ...
0
votes
3answers
672 views
How likely can my data be recovered after Windows CHKDSK performed on a degraded RAID 5 array?
We have a RAID 5 setup with 3 SATA disks, #2 went down as reported on the pre-POST screen. Unfortunately, for some reasons beyond my control, the system was rebooted with a degraded RAID :-O
Windows ...
3
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2answers
139 views
Drive configuration for 5 large databases
I've got 5 databases, each 300GB, currently on a RAID 5 array consisting of 5 drives. All the databases are used heavily, at the same time, so drive speed is an issue.
Would I see better performance ...
0
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2answers
256 views
HP E200i Controlller RAID Configuration fon Win2008 Ent, Sql Server, IIS Apps etc need opinion
Actually I run RAID 5 (4 x SAS drives) with
Win 2008 Ent(1x host)
Win 2008 End(3x guest)
Sql Server 2005 Std (on guest)
3 x asp.net applications (on guest)
Hyper-V
I bought 3 x drives to create ...
9
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9answers
11k views
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 ...
0
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2answers
328 views
Windows 7 Sharing issue on RAID 5 Array(s)
Greetings all, I'm having a very odd error with a windows 7 ultimate x64 system.
The network system setup is as follows:
2x XP Pro 32 Bit machines
1x Vista ultimate x64 machine
2x Windows 7 x64 ...
5
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1answer
1k views
Why do I get a DegradedArray event with mdadm
Just so we're clear on what's happening:
I bought 4 new sata 2 drives, with the intent of using them in a raid5
all drive are fully recognised by both my bios and my linux box (gentoo)
I created a ...
3
votes
4answers
1k views
MediaShield RAID 5 is showing up as 760GB when the actual size is 2.7TB
I just finished setting up Windows 2003 Server on my new server, and I started setting up a RAID 5 for it.
I have 4x1TB Hard Drives. From MediaSheild RAID Utility (at boot time) the RAID size is ...
16
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10answers
33k views
Which is better: RAID5 + 1 Hotspare / RAID6?
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?
1
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5answers
4k views
Disk failed part way through 3ware RAID 5 rebuild
I have a 3ware 9650SE RAID controller with a RAID 5 array containing 15 Seagate ST31000340NS disks. After noticing ECC errors in the Port 10 drive I replaced it with a spare and began a RAID rebuild. ...
