RAID, an acronym for Redundant Array of Independent Disks (sometimes incorrectly referred to as Redundant Array of Inexpensive Disks), is a technology that provides increased storage functions and reliability through redundancy. -Wikipedia

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159 views

Install OpenSuse 13/Linux on Intel raid ESRT2 fails. SLES works

I have an Intel box with S2600GZ board. I have tried to install a few Linux distros and non can detect the ESRT2 raid. All distros claim "No disks found". My goal is to install OpenSuse 13. The only ...
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1answer
519 views

Proliant DL320G5P, Embedded RAID controller: Windows installation shows phisycal disks, not logical drive

I am installing Windows 2012R2 on Proliant DL320G5P, with the Embedded SATA RAID controller. I have 4 disks, with two different RAID 1 (mirror) arrays. I have a "strange" situation: Windows ...
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0answers
933 views

How to recover an mdadm array on Synology NAS with drive in “E” state?

Synology has a customized version the md driver and mdadm toolsets that adds a 'DriveError' flag to the rdev->flags structure in the kernel. Net effect - if you are unfortunate enough to get a array ...
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0answers
96 views

mdadm array fails to start at boot, bad superblock on component drive

At boot my mdadm raid5 array fails to start, saying that one of my disks (sdi) has a bad superblock. However, once I log in, I can start the array no problem with mdadm --assemble /dev/md0 ...
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3answers
116 views

SQL Server 2012 RAID Setup and Performance [closed]

At my company we are in the process of setting up a new SQL Server 2012 box. We have 6 physical drives with 3,000 gigs each. We are considering two different RAID configurations and are wondering ...
2
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1answer
1k views

HP Dynamic Smart Array B120i ESXi performance issue

One of our small offices was in need of a small server to perform certain tasks. Because the noise and size an of a regular server i went with the HP ProLiant Microserver Gen8 G1610T. Witch i expected ...
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votes
1answer
426 views

Replacing a HP P410 RAID Card

I'm getting kernel panics and I'm suspecting it's the RAID card locking itself up based on the messages in the panic log. I'm not sure if it's really the card or not. When it boots back up, it says ...
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3answers
610 views

Turn off RAID on HP DL380? [duplicate]

Can anyone tell me how I can turn RAID off on a DL380-G5. I just want the disks connected directly without any RAID as I want to use this to test Microsoft's software RAID. Can't seem to find ...
7
votes
1answer
239 views

Which block sizes for millions of small files

I have 2x 4TB Disks in hardware RAID1 (it might be a LSI MegaRaid) on Debian Wheezy. The physical block size is 4kB. I'm going to store 150-200 million of small files (between 3 and 10kB). I'm not ...
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1answer
505 views

How to diagnose failed drive on server with raid storage controller?

I have problem with one of my Dell PowerEdge R210. Machine is with Centos 6, today system logs started to inform that the hard drive is failing. Jan 6 03:20:12 centos6 kernel: LSI Debug log info ...
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2answers
601 views

Are consumer class hard disks okay for zfs?

I just recently bought a new server an HP DL380 G6. I replaced the stock smart array p410 controller with an LSI 9211-8i. My plan is use ZFS as the underlying storage for XEN which will run on the ...
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3answers
175 views

What happens if fsck.ext4 -y is run on a ext3 fs and how to I recover from it

I had a mountable fs (pretty sure it was ext3), fsck.ext4 was run with -y and ended in a segmentation fault. Now it is unmountable (dmesg says it's corrupt) and identifies as a ext4 fs via the "blkid" ...
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votes
3answers
223 views

Does software RAID-0 really improve performance?

I am going to lease a server and I have two options, SATA or SSD, I decided to save the money and go for the SATA option. But I do not need all that storage they are giving me! So I thought MAYBE I ...
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2answers
198 views

How do I fix my server to boot properly after removing / adding a drive on my mdadm software RAID

I configured a RAID-5 array for a data partition mounted on /mnt/data. My system is not booting on it (/ and /boot is on a dedicated drive not part of any RAID array). I added a 4th drive to my 3 ...
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votes
1answer
132 views

mdadm raid10 or nfs performance issues?

I have a fresh mdadm RAID10 device which is healthy, built from 4 x 7200rpm SATA 3 drives: # cat /proc/mdstat Personalities : [raid10] [raid1] md2 : active raid10 sdc3[5] sda3[4] sdb3[1] sdd3[3] ...
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1answer
94 views

Raid 1+0 on HP ML350 G5

I'm trying to setup a Proliant ML350 that has a SmartArray E200i Raid controller. I want to setup RAID 1 but there isn't any option for it, just 0, 1+0, and 5. I only want to use 2 drives since I just ...
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2answers
129 views

Indepedent pairs of RAID 1 is superior to RAID 10

I am rather new to databases. I was reading up on RAID Storage and it seems that the consensus is that RAID 10 is RAID 10 is best is terms of performance and redundancy However at the end ...
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1answer
100 views

Can disk be purchased by user from vender other than Dell and add to Dell PowerEdge R720xd server after the server is purchased?

The following is the price of the 4TB NL-SAS drive offered by Dell for PowerEdge 720xd. 4TB 7.2K RPM Near-Line SAS 6Gbps 3.5in Hot-plug Hard Drive [$663.38] It seems to be too expensive. A similar ...
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0answers
33 views

Unsure about Adaptec 6805 included cables

I have installed the Adaptec 6805 card into my server. It came with the cables needed to connect the card directly to the SATA drives. http://www.adaptec.com/en-us/support/raid/sas_raid/sas-6805/ ...
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votes
1answer
61 views

What are the pros/cons of software raid made up disk connected over SATA and others over USB? [closed]

I would like to use RAID1 with 1 SATA disk and 2 USB disks PS: This is an ARM board (cubietruck) with only 1 SATA port and 2 USB ports. PS2: The OS boots from a SD card :) PS3: The setup does not ...
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1answer
280 views

AWS hs1.8xlarge RAID performance issue

EDIT: I cannot get my hs1.8xlarge AWS instance to deliver high performance IO from its local 24 drives. Please don't tell me how to make EBS volumes faster. Context: After running for a couple of ...
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2answers
285 views

OMSA Add new disk and convert current single disk to RAID1

We got our new server last week, and unfortunately one of the two disks could not be delivered. Now we've got the second disk, and I want to install it and join it with the current disk to create a ...
2
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1answer
30 views

IBM ServerRAID 6i Battery

I have an IBM Server which has a Raid Controller ServeRAID-6i. The battery of the Raid Controller is been swelled and I have to change it. I couldn't able to find the battery specification/voltages so ...
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2answers
86 views

How can it be that mounting and unmounting takes hours to complete?

I am running an Ubuntu server 10.10 machine with 24 hard disks (and two OS drives). I am using a script to mount all the drives to their desired mountpoints. This works pretty fast, as expected, ...
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2answers
151 views

Nested RAID (RAID0 in RAID1) fails on bootup [closed]

I built a RAID setup with three drives, two 1.5 TB (sdb and sdd) and one 3TB (sdc). My approach is to combine the two 1.5 TB drives into a RAID0 drive (md3), and create a RAID1 mirror (md2) with the ...
2
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0answers
203 views

mdadm error: found two disks with the number 0

Im running a server deep in the forest , and after a hard disco failure i got this error. error: found two disks with the number 0. It a server with 2, 1 TB disc in raid 1 with mdadm 0.9 SDA failed ...
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votes
1answer
135 views

Dell H310 RAID controller in PowerEdge 2950 III

Is anyone able to confirm whether the Dell H310 RAID controller will happily live in a PowerEdge 2950 III? It's a PCI Express 2.0 8x card. I see reports of the H700 in the 2950, which is the same ...
0
votes
1answer
240 views

Move encrypted debian system on luks+lvm with dropbear from single SSD to SSD-RAID1

We have a debian linux server which has a single 120GB SSD and 2x2TB HDDs as RAID 1. We now have to move to another server which has 2x240GB SSD and a single 2TB HDD. The aim is to move the current ...
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2answers
127 views

Expandable Linux filesystem w/ redundancy & support for different drive sizes?

I did a bit of research already and didn't come across any filesystems so far that have the following features: Expandability, Redundancy, and the ability to utilize the full capacity of different ...
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2answers
308 views

LSI Cachecade Pro 2.0 with RAID10 SSD Cache?

I'm trying to add a RAID10 SSD Cache to a VD by this command: [root@livecd storcli]# ./storcli64 /c0 add vd cachecade type=r10 drives=252:4,252:5,252:6,252:7 assignvds=0 Controller = 0 Status = ...
2
votes
1answer
34 views

MDADM RAID5 Size

I currently have 9x1TB disks in RAID5, which to me is 8TB worth of storage. However, I am not getting that at all. This was after moving from RAID6 to RAID5 and performing the necessary commands to ...
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2answers
563 views

Windows Server 2012 gives error on installation

I have a HP proliant gen8 server on which i want to install windows server 2012. This is supposed to be a file server hence it has 8x1Tb physical drives in it. The problem is after creating a ...
3
votes
1answer
102 views

RAID-5 array being split on reboot (ubuntu)

I've set up a RAID-5 array on Ubuntu 13.04 (kernel 3.8.0-27-generic) using mdadm - v3.2.5 - 18th May 2012. It appears to work fine and be in high spirits: $ cat /proc/mdstat Personalities : ...
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1answer
24 views

Loading RAID Drivers For Windows Servers

I noticed many RAID controller manufacturers package their drivers in .exe files rather than INF's which is what server 2003/2008 seems to want when you load a driver during setup. How can I get these ...
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0answers
1k views

Patrol Read Aborted on PD

Getting “Patrol Read Aborted on PD" warning message on MegaRAID Storage Manager. After research I found that Patrol Read and Consistency Check (CC) was scheduled by controller to run at the same time ...
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2answers
89 views

RAID 1 - IOPS Write Penalty 1 or 2

I keep seeing articles describing the RAID IOPS write penalty for RAID 1 (and RAID 10) as 2. RAID 0 would have a penalty of 1, of course, since every write is simply written to disk. RAID 1 is ...
2
votes
2answers
322 views

Detect HP ML370 G5 Bad disk in RAID0

I have one HP ML370 G5 server. Which has four 146GB SAS disks and two 300GB SAS disks that are configured as RAID 0. I have encountered a problem with one of my disks. The windows server event viewer ...
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1answer
57 views

Secure Method for RAID Device Permissions for Network Storage

I manage a smallish network that supports a dozen or so employees. We have about 8 TB of data that lives on several NAS devices. I built a 20 TB RAID file server (with a XFS single partition) recently ...
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votes
2answers
574 views

ESXi - What could be the cause of high write latency on a local datastore?

I have a ESXi 5.5 server and I'm experiencing high write latency on a local datastore. This datastore is on a virtual disk provided by a RAID card (two SATA disks on RAID 1). When I copy large ...
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0answers
21 views

Harddrive check going-on?

I have a server that has suddenly become unusable (responds very slowly to requests). It seems to be related to some on-going RAID check. Here is what I get when I run cat /proc/mdstat : ...
0
votes
1answer
244 views

Can I use a RAID card with chipset SIL3124 with no driver?

I have a software RAID card with a SIL3124 chipset. (This one). As you configure the RAID via BIOS, is it possible to use this card with 3 disks (RAID 5) with any OS without installing any driver on ...
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votes
1answer
140 views

Mounting a RAID array on Debian Wheezy

I've got a pair of 1TB drives on my Debian fileserver set to RAID 1 using a PCI controller, but it doesn't want to mount them. If I do a blkid the drive doesn't show up, but I know (from using cfdisk ...
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2answers
82 views

Check health of RAID array

I have a server with RAID 1. Currently when I type in the following command: cat /proc/mdstat I get: Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty] ...
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0answers
35 views

What is the issue with the boot setup on this raid array?

After a secure erase of /dev/sda (Samsung 840 Pro) I had to setup grub on /dev/sda2 (for some unknown reason the /boot partition is the second one). So I ran something like this: grub root(hd0,1) ...
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1answer
181 views

Is it safe to snapshot an mdadm RAID with only xfs_freeze?

Is mdadm guaranteed (and trusted via experience) to be safe for taking snapshots with only an xfs_freeze? I have encountered vague warnings about mdadm still working in the background, thus making ...
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votes
1answer
30 views

mdadm grow operation giving nonstop libata errors

Running Debian 7, mdadm 3.2.5. I issued a command to grow a 5 disk, 3 spare raid 5 array to an 8 disk, 0 spare raid 6 array: mdadm --grow /dev/md0 --level=6 --raid-devices=8 ...
2
votes
3answers
401 views

Spurious RAID controller failures. Is my controller bad or are my disks bad?

I have a Dell T7500 with a PERC H710P connected to 4 3T drives in a RAID5 array. Also connected to the controller are 2 256G SSD drives, not configured in an array. A Linux server is installed on ...
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1answer
325 views

How to delete removed devices from a mdadm RAID1?

I had to replace two hard drives in my RAID1. After adding the two new partitions the old ones are still showing up as removed while the new ones are only added as spare. I've had no luck removing the ...
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1answer
555 views

RAID1 on existing CentOS6 Install

I have two 500GB hard drives in my server. Currently, there is no RAID configured, but CentOS6 is installed (as a bare install for now). Is it possible to set up a software RAID-1 so that both drives ...
3
votes
1answer
594 views

flashcache with mdadm and LVM

I am having trouble setting up flashcache on a system with LVM and mdadm, I suspect I am either just missing an obvious step or getting some mapping wrong and hoped someone could point me in the right ...