7
votes
4answers
672 views

SW SSD Raid 1 over HW RAID 10

A provider(data center) recommended I go with 1TB SSDs in a software RAID 1 over HW RAID 10 with mechanical drives. Their quote: Typically SSDs are most reliable than RAID cards and since you ...
0
votes
0answers
767 views

KVM LVM-based guest… kernel: Buffer I/O error on device. Failing drive?

Currently setting up a small KVM host to run a few VMs for a small business. The server has 2 drives in software md RAID 1, then I have it set as a PV in an LVM setup. Guests and hosts are all CentOS ...
0
votes
1answer
135 views

Raid0 assemble disk again?

Our server recently suffered a disk failure, so our hosting provider put a new Disk in with CentOS so we can login and see if we can recover the data. We had 2 x 120 GB SSD drives in software RAID0 ...
0
votes
3answers
159 views

RAID 5 with two failed devices

I have a software RAID 5 with 6 devices and one of them needs to be rebuilt. Until now, everything is OK. But, while the disk is rebuilt, it was found bad sectors on another disk and is being marked ...
1
vote
1answer
334 views

Failing disks in RAID array - strategy suggestions required

I have a linux based software RAID 5 array. SMART has just started to send me emails complaining that one of the 5 disks has a Current Pending Sector Count of 9 and also an Offline Uncorrectable Count ...
0
votes
1answer
225 views

Linux RAID10 hit bad disk while re-syncing. Is it hosed?

I have a Linux software RAID10 device on md0. It's made up of 4 1TB disks sd[abcd]. Yesterday Smart emailed me to say a disk was going bad (seek errors going up and reallocated sectors). I rebooted ...
5
votes
2answers
977 views

How to know which disk has failed on a Mirrored Raid? marked as DR0

Our 2ndry DC, which is on a W2K8R2 Mirrored software raid has lost it's sync, and disk management displays the failed redundancy error How do I know which of the disks has failed? (beside to try ...
1
vote
1answer
1k views

Linux Software RAID: How to fsck on hard drive?

We have a Linux server running with Software RAID1. We see some issues in /var/log/messages like: unreadable sector. I want to perform a complete fsck on the drive to get some more information, but a ...
0
votes
2answers
700 views

RAID disk failure - Replace disk or whole array?

I have a 5 disk Raid5 array of Western Digital Green (WD10EADS) 1TB. Raid5 is via Windows Server (software raid). One disk has failed, and it looks as though I can't get the same model replacement. ...
2
votes
3answers
1k views

What would happen if I did a raid on a SSD and an HDD?

I am building another server (cheap) and would like to go with a 256GB SSD drive for my boot and data. This will be enough for my needs, but just having one SSD scares me for a couple of reasons. If ...
1
vote
1answer
1k views

Convert to dynamic disk / option disabled

I'm trying to setup a software RAID-1 at a new hosted server. It has two 3TB disks in and I've installed a fresh copy of Windows Server 2008 R2 Web Edition with SP1 on one of those disks. A ...
0
votes
1answer
94 views

Hard drive performance in small-sized server+RAID 5 [closed]

Disclaimer: I'm an undergraduate intern and this is my first server build I've been asked to build a small server for our team around the office. We are trying to maximize space (our motherboard has ...
6
votes
1answer
2k views

Poor Linux software RAID 5 performance with NCQ

While salvaging a 2-disk failure in my 3-disk RAID 5 setup, I happened to notice reconstruction was faster with NCQ disabled (~90M/sec) than with the NCQ enabled (~50M/sec). Running bonnie++ to ...
0
votes
2answers
1k views

2nd drive in RAID 1 keeps failing

I have a bit of a problem here. I have a Ubuntu Linux server set up with 2 SAS drives in a software RAID 1 (created with mdadm). The RAID will run fine for a day, I can do cat /proc/mdstat and it ...
4
votes
2answers
175 views

How to salvage a RAID configuration?

A buddy of mine and I are in the process of trying to salvage an old server that hasn't been used for a while, but whose data is critically important. It's an old box with a series of hard drives ...
5
votes
4answers
450 views

mdadm: Replacing array with entirely new drives

I have a server with three 500GB drives, with most of my data in a RAID5 configuration spanning the three of them. I just purchased and installed four 1TB drives, and the intention is to move off of ...
2
votes
3answers
3k views

Windows 2008 RAID Failed Redudancy - which is the “current” disk?

I have a Windows 2008 Server with a two-drive software RAID 1 (mirroring). Last night one of the drives apparently failed (just disappeared from the system) and I had to boot from the secondary plex ...
0
votes
2answers
1k 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
0
votes
2answers
386 views

Server doesn't detect/show partitions of disk in /dev

for some reason one of my disks doesn't show its partitions in /dev/, however when I check it with cfdisk they are there, and writing the partition table to it again makes them reappear. This is kind ...
2
votes
5answers
390 views

Future proof RAID-like storage solution in Linux

I'm currently running my storage server on 4x1TB disks in RAID5. There are no issues here, no lack of speed, no lack of performance. But now these disks are getting out of free space and I have the ...
4
votes
2answers
1k views

Simulate a hard disk fail on Virtual Box

I'm testing some NAS setups using virtualbox, with several virtual hard drives, and software raid. I would like to test the behavior under certain fails, and I would like to simulate that one of the ...
1
vote
2answers
3k views

Hard drive device names are different from one reboot to another in Ubuntu

I have an Ubuntu machine (10.04 but had the same problem in 8.04) with a bunch of drives that I use as a file server: 1 SATA that I boot off of 2 IDE in RAID1 2 SATA in RAID1 The problem is the ...
1
vote
1answer
440 views

Moving existing software raid to different windows 2003 machine

On a windows 2003 server with 2 x 750 GB raid for data (using the builtin windows 2003 software raid with dynamic disks), the main board broke. (The system and the whole c:\ with c:\windows, ...
6
votes
9answers
2k views

2 drives, slow software RAID1 (md)

I've got a server from hetzner.de (EQ4) with 2* SAMSUNG HD753LJ drives (750G 32MB cache). OS is CentOS 5 (x86_64). Drives are combined together into two RAID1 partitions: /dev/md0 which is 512MB ...
4
votes
4answers
2k views

HP Onboard Software SATA RAID. Knowing which drive failed

On of our HP Proliant DL320 G4's is reporting a failure. It's running Windows 2003 and configured using the built in software SATA Raid. The array manager shows only one drive attached labelled "Port ...