0
votes
0answers
14 views

OCZ Vertex 4 64 GB timeouts on Areca 1880IX-16-4G

I use 3x OCZ Vertex 4 64 GB in RAID5. If they work then it's all ok, but suddenly random drives are dropped from array with timeout errors. Sometimes even two of them which causes filesystem errors. ...
0
votes
0answers
23 views

Is it possible to convert a btrfs RAID5 to a RAID6 with the same disks without losing data?

How would I convert an existing RAID5 (single parity) btrfs setup to a dual parity RAID6 configuration given enough free available disk space, using the same disks, without swapping out data ? ...
0
votes
1answer
19 views

Format system and preserve RAID

I have a system on an SSD, and beside that, a set of 4 disks are connected over software RAID 5. I have a problem with that system now and I'd like to format that system and install a new one. If I ...
0
votes
1answer
47 views

RAID5 vs RAID4 purpose of floating parity

I still did not get why is RAID5 better than RAID4. I understand both computes parity bits that are used for recovering if some failure occurs, the only difference is in storing those parity bits. I ...
0
votes
0answers
34 views

Skip initial resync on a new Windows software RAID 5 build?

I just added 8x4TB and created a software RAID5 volume. Server 2008R2. Based on progress so far, it's going to take 8 days to complete the resync. I'm not a busy man, but that's asking a lot. ...
0
votes
1answer
46 views

Setting up a RAID 5 Array

I am currently trying to convert my drives from just a bunch of external disks, each one individually shared from my (CentOS) server into a RAID array (ideally, RAID 5). At current, my drives are: ...
1
vote
3answers
226 views

In a RAID 5 disk array, does recovering a drive increase chance of another drive failing?

If you have a basic RAID 5 array of 3 or more hard drives, and one fails, does this increase the chance of one of the other drives failing and making the full recovery impossible? If every one of the ...
2
votes
1answer
151 views

Is Btrfs vulnerable to RAID write hole effect?

If not, does it mean that Btrfs in RAID mode is fully resistant to power failure?
0
votes
0answers
38 views

RAID and rebulding

I have the following setup: Raid 5: 1 TB Drive 2 TB Drive 2 TB Drive 3 TB Drive Which give me a total of 3TB. I just set this up tonight and I was testing to see what happens when I ...
0
votes
1answer
91 views

Raid5 reconstruction is extremely slow

Three days ago added another drive to my RAID5 array with 3 drives, each drive is 4TB. Since then than only 42% has been completed MegaCli64 -LDRecon ShowProg L0 -a0 ...
1
vote
1answer
404 views

Assembling an mdadm array with “possibly out of date” disks

I've recently moved house and have had some power problems after switching on my file server that's using a mdadm RAID5 set up. The file system I'm using is ext4. It seems that at some point two (of ...
2
votes
1answer
44 views

Onboard RAID w/ Recovery

I am looking at purchasing the ASRock Z87 Extreme 6ac and I was unclear on if I should use onboard RAID or a dedicated card. My system will be well enough off that I won't have to worry too much on ...
1
vote
1answer
254 views

Restart degraded RAID array after crash

I've had to (temporary) reduce my RAID5-Array, so that there are four out of five disks available. Things getting worse as my system crashed during write process. After reboot the system wants to ...
2
votes
2answers
63 views

How picky are RAID controllers when replacing a drive?

I had a drive fail in a RAID5 array and I'm working on finding a replacement. It's an older drive that's fairly hard to find, and most of them out there are used. How close of a drive do I need to the ...
1
vote
2answers
141 views

One unknown drive in previously operational RAID5 array

I have a RAID5 array on my computer, 3X 200GB sata drives. Everything has worked great forever but all of a sudden when I turn it on the BIOS shows that only two of the three drives are functioning. ...
0
votes
1answer
251 views

Is it possible to use grub2 with a linux root partition under Soft-RAID5?

I need some more space in my computer, therefore I want some basic changes be done. One of those is setting a RAID up for all files to be a bit more robust (I have just had a hd crash, so I am a bit ...
2
votes
1answer
330 views

Interesting Windows install issue with RAID and an SSD

I have been trying for days to solve this issue, so any help would be appreciated. Here is the issue: I have a Gigabyte GA-890FXA-UD5 motherboard. Here is a link to the manual and pages starting at ...
2
votes
1answer
1k views

LaCie NAS failed - Recover Raid 5 From bad device

here is my problem: I have a 5disk (Seagate 2To) RAID5 working with a NAS LaCie 5big. Each disk is still working but the NAS device has failed and it refuses to boot with HDD inside (LaCie helpdesk ...
2
votes
2answers
7k views

Why is RAID5 disabled in windows 8?

I want to create a RAID 5 array in windows 8 with 5 Dynamic Hard Disks and it is grayed out. If this is not possible why not hide that option. If it is possible why it is disabled? after your ...
1
vote
2answers
2k views

Debian installation and RAID5

I just bought a HP Microserver for use it as dns, http, vpn, file storage and also for backups of other computers at home. I already have 2 1Tb HDD's, so I thought to buy another 2 HDD's and install ...
1
vote
1answer
132 views

Hardware RAID 1 With ERC/TLER/CCTL

I am aware of the problem when using standard consumer-grade drives with RAID levels 5 and 6; if a drive takes too long trying to read and/or repair a bad sector, it will be dropped by a hardware RAID ...
2
votes
2answers
1k views

Testing software RAID5 by pulling a HDD live. Bad idea?

I'm running Ubuntu Server 10.10, with software RAID5 and LVM running on top of that. I have four 2TB HDDs. I also have a separate boot drive with incremental full-system snapshots that run every four ...
5
votes
1answer
431 views

A weird issue relate to ext4/lvm/raid-5 after partition recovery

I have 3 hard disks, in the following paragraphs named /dev/sda, /dev/sdb and /dev/sdc, newest came first. Note: /dev/sdc has one primary partition /dev/sdc1, one extended partition /dev/sd2, and 3 ...
1
vote
1answer
75 views

GRUB only sees first of 2 identically-configured drives in RAID 5 array?

Has anyone ever come across a case where of the two (virtual) disks that are members of the same hardware RAID 5 array (LSI 9750), GRUB can only see the first? It's a 100% hardware RAID 5, to the ...
0
votes
1answer
187 views

How to expand Raid 5 on ICH10 - Gigabyte ex58-ds4?

I was wondering if there is a relatively simple way to expand my HD space. My setup is 4 x 640 GB drives. Motherboard has 4 ports on 1 controller and 2 ports on another controller, however they can't ...
1
vote
1answer
280 views

Restoring Raid 5 Meta data / Table

2 part question at end of this text My problem: My CMOS was cleared, BIOS was set to IDE instead of RAID. My understanding (from other sites) is that motherboard Intel ICH10R data is stored in BIOS ...
2
votes
1answer
396 views

RAID 5 Recovery Reset CMOS and drives show up as 2 Member 4 non-Member

How do you restore a raid array (not part of your C drive) after resetting BIOS and installing a new C (Windows) drive. My setup: (its a LOT of data, i cannot afford to lose it, most of it is ...
1
vote
1answer
355 views

Disk durability when using RAID 10 vs RAID 5

Most of the time technical articles about different RAID levels mostly about how redundant they are, how fast on read/write etc. But I can't find information about would a disk in a certain RAID live ...
0
votes
3answers
302 views

Is it better to partition hard drives for a RAID?

I have four 1TB hard drives and want to set them up in a RAID (5). Some calculations: 4x1000G = 3000G usable space 8x500G = 3500G usable space 16x250G = 3750G usable space Does this mean it will ...
8
votes
2answers
19k views

Can I set up a RAID 5 with a bunch of drives of different sizes?

I currently have 3 1TB drives, a couple 500GB ones and some 750GB ones. Can I put them all in a RAID 5 configuration or do they need to be of same size?
2
votes
1answer
319 views

RAID5, Can you clone the drive and access the media from Windows?

So my server is about to die and all of a sudden my RAID5 isn't accessible anymore. Is it possible to access the files on those drives some other way? Like maybe plugging them into another comp, ...
1
vote
0answers
210 views

What caused my RAID 5 array to become corrupt?

My machine has an Intel ICH9R RAID controller built in to the motherboard and an additional SIL3124 controller. I had two 1Tb hard disks in a RAID0 array on the Intel controller and 3 1Tb disks in a ...
2
votes
0answers
263 views

Reading or writing with a 4 WD5000AADS drive RAID 5 array drops to 0 speed

Edit, 10/31: Crash-- complete system lockup. Booted computer, had strange lag for visiting ANY webpage in Chrome.. Figured that either a network problem existed, or Chrome could not write to disk ...
5
votes
1answer
2k views

4 x 2TB drives, safe to use RAID-5? What is failure rate?

I've read a number of opinions on the risks of running a RAID-5 using 4 x 2TB drives. Apparently the failure rate of the 2TB drives is so high that there is less redundancy than is generally expected. ...
0
votes
1answer
74 views

RAID Reconfiguration

I have 4 1TB hard drives that I'm about to put in RAID 5. One of the drives is defective to the point that it isn't usable. I have a spare 1TB drive, but it runs at 5900RPM as opposed to the other ...
0
votes
1answer
306 views

How to increase the capacity of a RAID 5 array?

Assume that I built a 2TB RAID 5 array, and it's running and some data is stored on it. Now I need to increase its size to 5TB. Can I increase capacity, particularly by adding extra drives? How? If ...
1
vote
1answer
315 views

how to find bad disk in raid array?

I have a RAID5 array and one of the disks clicks whenever I start up the array. During array operation, it seems to run fine though. This has me worried that I'm going to start running into problems ...
2
votes
2answers
2k views

Can a Raid5 array be optimized using defragmenting or other maintenance tools?

I have a Lian Li Ex-50 Raid Array setup to be 4x 2TB WD Black in a Raid5 formatted to HFS+ (journaled). The raid array is a hardware raid running through a Sil3132 chipset (SATA2 via eSata ...
1
vote
1answer
547 views

Intel Rapid Storage RAID 5 error, “Missing Drive”

Just recently I purchased a new motherboard for my PC due to the fact I had a motherboard with the defective 67 Intel chipset. The reason I bought the new motherboard was because I started getting ...
1
vote
1answer
1k views

rebuilding raid array (rocket raid 1740)

so my rocketraid 1740 controller has 4 connectors .. i set it up with raid 5. drive on port 4 failed, but it comes back online after computer reboots. array saw this, and started to rebuild the ...
1
vote
1answer
220 views

HTPC : Ubuntu 4-Drive Raid5, Expanson

So right now I have a HTPC with (3) 1TB harddrives Software-Raid5'ed giving me something like 1.9TB of storage available for recording TV shows / media / backing up my DVD's. As I'm about 50GB off ...
0
votes
1answer
388 views

Possible to load old software raid array on new system? Ubuntu

I am looking into a more redundant solution to my home server. I know raid is "not" a backup, but I am looking into a raid 5 solution for these reasons. I would be very annoyed if I lost my data, ...
1
vote
1answer
798 views

Recover Linux software RAID5 array after server upgrade

I recently upgraded a server from Fedora 6 to Fedora 14. In addition to the main hard drive where the OS is installed, I have 3 1TB hard drives configured for RAID5 (via software). After the upgrade, ...
4
votes
3answers
1k views

RAID5 / RAIDZ - is it possible to enlarge without losing data?

If I have a RAID5 with 4x1TB drives, and then in, say, a year I decide to upgrade to 4x2TB, can I swap out one drive at a time, then let the parity rebuild, even if it's mixed-size drives? Obviously ...
11
votes
5answers
17k views

How does parity work on a RAID-5 array?

I'm looking to build a nice little RAID array for dedicated backups. I'd like to have about 2-4TB of space available, as I have this nasty little habit of digitizing everything. Thus, I need a lot of ...
0
votes
1answer
692 views

Which RAID for CentOS and Which NAS for CentOS?

I am trying to order a DELL server rack mounted PowerEdge R310 Chassis, Up to 4 Hot Plug Hard Drives and LCD. Question: RAID1 if i use, can i lose a disk and get back data? What happen if i have ...
1
vote
1answer
611 views

Build a RAID-5 USB Array or NAS?

I'm looking to build a RAID-5 or RAID-6 hard disk array to be used as a centralized backup location for my home network. I have a lot of 4-8GB DVD ISO files which I intend to serve over the network to ...
2
votes
1answer
544 views

Software RAID 5 with Multiple Partitions (one encrypted partition)

Can I have multiple partitions using Software RAID 5 on an Ubuntu Server? For example, say using a 4 drive RAID 5 setup, I want one massive partition for storage and a second smaller but encrypted ...
1
vote
1answer
145 views

Where do I start diagnosing a RAID drive that won't come up?

I've had this Cavalry 4TB RAID drive connected via eSATA to a Win2003 box for a year or two, and it's not coming up any more (can't see it in Explorer, or in disk management). I've also tried ...
4
votes
7answers
13k views

Should I use “Raid 5 + spare” or “Raid 6”?

What is "Raid 5 + Spare" (excerpt from User Manual, Sect 4.17.2, P.54): RAID5+Spare: RAID 5+Spare is a RAID 5 array in which one disk is used as spare to rebuild the system as soon as a disk fails ...