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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Replace Raid 5 HDD with a non empty HDD

Is it safe to replace a corrupt HDD (HDD-A) inside a Raid 5 array (enterprise class hardware) with an almost full disk which contains almost the same data as the corrupt disk (HDD-B)? Will the new ...
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5 views

HP Microserver AMD Raid controller

I have a HP N54L Microserver which i have been using successfully with Windows Server 2012. I only have the one hard drive in but want to add another in RAID 1 and then another two much larger drives ...
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1answer
39 views

What could be wrong with our HP Proliant Server

While observing our file server yesterday, I witnessed a BSOD, and after a restart, the Server OS (2003) cant boot. We have 6 raid drives. I noticed the disk lights and discovered the first four from ...
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0answers
7 views

Xenserver has no local storage in raid

I'm using and LSI megaraid 8708em2 controller and trying to install xenserver 6.5. Installing without the raid vdisks worked perfectly but as soon as I setup raid 60 there is no local storage. ...
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1answer
20 views

How/When to physically remove a failing harddrive after replacing it in a Linux RAID?

I have a Linux software RAID-1 with mdadm. Similar to this question ("How to safely replace a not-yet-failed disk in a Linux RAID5 array?"), I want to replace a disk in a the raid. My question might ...
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0answers
11 views

QNAP NAS first-time synchronization + QPKG installation [closed]

I was wondering if it is advisable to install QPKGs (nzbget, sickbeard, couchpotato, etc) while the Raid 5 is doing its first time synchronization. I am also uploading 2TB of data while it is ...
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0answers
32 views

Growing RAID0 to RAID5 sync delayed

I've recently switched my NAS with a single 4 TB disk to a RAID setup, with the goal of implementing a 3-disk RAID5. To do this without a 4th disk and without loosing my data, I first set up the 2 new ...
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1answer
29 views

Expanding Disk Space on PowerEdge R710

I want to expand the disk space on an R710 with a PERC H700 Integrated. It is currently configured with: 2 (3.5" SAS 6Gb/s 15000 RPM) drives in a RAID-1 For OS. 4 (3.5" SAS 6Gb/s 15000 RPM) drives ...
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0answers
8 views

With Adaptec's arcconf utility, why can't I make the 'identify' command work (Adaptec 6805 controller)

I've got a pair of Linux servers with Adaptec 6805 RAID controllers in them. One is running CentOS, one is running Debian. I have the Adaptec command line utility 'arcconf' installed on both ...
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1answer
30 views

Raid 50 on Dell Perc H700 Integrated Resynching state

I have Raid 50 configured on a Xenserver host with a Perc H700 card and a few weeks ago, replaced a disk which had failed. The raid had rebuilt and I am now checking the status of the array via ...
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0answers
34 views

RAID-6: Two drives failure with 3ware 9650SE

We have a 6-drive RAID-6 on one of our servers. Each drive is a 750GB Seagate, and they are connected with Hardware RAID card 3ware 9650SE. We do not have sparse drives. The system is old and probably ...
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8answers
3k views

Consumer (or prosumer) SSD's vs. fast HDD in a server environment

What are the pro's and con's of consumer SSDs vs. fast 10-15k spinning drives in a server environment? We cannot use enterprise SSDs in our case as they are prohibitively expensive. Here's some notes ...
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1answer
41 views

Seagate's 30TB NAS with SimplyRAID configuration

I recently bought a Seagate NAS Pro 6-Bay 30TB Network Attached Storage Drive (STDF30000100) from Amazon ...
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2answers
53 views

RAID 6 - any write amplification in 4-drive RAID?

We're planning to move from a 4-drive RAID6 to a SSD RAID 1, and I was analyzing smartctl data to see how many GB we've writen to the drives over the past year so I can estimate the lifetime of the ...
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2answers
79 views

Identify which drives belong to a specific HP RAID 5 Group

A total of 32 drives were removed from x4 decommissioned HP DL380 G6 servers (eight per server). The setup of the eight drives per host was into two RAID Groups: RAID 1 = SLOT 1, 2 = ESXi OS RAID 5 = ...
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1answer
22 views

Server disk failure predicted in raid1 array

I have a IBM 3650X M3 with 2 disks in a raid1 array. One of them is in "failure predicted" state. I have two question about this case: Should I trust it and change a working disk? How the system ...
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1answer
17 views

LSI Mega RAID in IBM x3690 - Hardware Failure move to spare system?

I currently have a hardware failure with an IBM x3690 having 8 SAS disks connected to an LSI Mega RAID Controller. I have a similar system (another x3690) can I place the RAID Controller and the ...
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0answers
47 views

The RAID 1 Time machine

Last night my server crashed, after reboot I have found it has a disk failure The configuration is 2 x 500GB sata on Centos 6 sda3/sdb3 is software RAID1 sda1/sdb1 = ext3 for / sda2/sdb2 = swap ...
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1answer
34 views

postfix SMTP outgoing gateway server, Software RAID1 vs RAID1 + RAID 0 on 2 disks

I have this old smtp server that is currently running Windows 2003 and with EOL I want to move it to something that will continue to get security upgrades but at same time I want to improve ...
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0answers
27 views

Database server: E5-2620v2 MLC SSD Software RAID1 vs E5-2650 Hardware RAID 10 / 2X RAID 1 for read performance and reliability [duplicate]

I am looking for a new database server and I have 2 options at this point with multiple configurations, all assuming same price. This will be a PostgreSQL database server with lots of READ (we are ...
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1answer
89 views

RAID1 drive not seen by CentOS 7 Installer on HP ProLiant DL360e Gen8

I need to install CentOS 7 on a HP ProLiant DL360e Gen8 server. The RAID1 has been configured in the bios: I have downloaded the driver from ...
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0answers
49 views

Unexpected LSI SAS 9211-8i RAID x8 SSD Performance

After attaching 8 850 EVO SSD to my LSI 9211-8i and creating a Windows Server 2012 R2 Storage Spaces 8 column virtual disk I copied a VHD from and to the virtual disk and observed ~300 MB/s transfer ...
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2answers
39 views

ext. 2-bay USB-Drive with RAID: btrfs RAID vs built-in RAID

For backups I want to use an external USB3 Drive: two HDD with RAID 1 (mirror) in one 2-bay enclosure. As filesystem I'll use btrfs because of subvolumes and checksums. Performance isn't important, ...
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0answers
31 views

How can I find out my centos RAID setup, with a LSI MegaRAID SAS 2108 controller?

I've bought an auction box from Hetzner which allegedly has 4 3TB drives in it. As a relative newb to this sort of thing I just want to see some reassurances on the command line that this is all ...
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0answers
38 views

Server reverted to may after reboot

I just had a problem on a client's server, it wasn't responding to anything so I forced a reboot. The client called shortly after to say the website reverted to a version from May. Checked the backups ...
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2answers
55 views

Detection of consumer SSDs by enterprise disk controller in non-RAID configuration [closed]

We (a client) are considering [insisting on] using consumer grade SSDs (to keep the cost down) in some Dell R710 and HP Proliant D380 G5 servers. I've looked about and people report the P400 cards ...
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0answers
49 views

How to repair multiply-claimed blocks?

I get a lot of the following logs in dmesg: [26159.277230] EXT4-fs error (device sdb1): ext4_iget:3875: inode #394497188: comm mv: bad extended attribute block 22794025699896 [26219.914802] EXT4-fs ...
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0answers
30 views

ZFS - Reconnecting a disconnected but fully intact disk

If a disk gets disconnected from a ZFS array, but the drive itself if totally fine, what happens when you reconnect it? For example, if I have a mirror of 2 drives, if one is disconnected, then ...
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1answer
35 views

Super Micro Model 827-16 -> CentOS 6 RAID Controller driver

I have a Super Micro model 827-16 (part no: 6027TR-HTRF+) and need to get CentOS 6 installed. The problem is that I haven't been able to confirm if there are CentOS specific/supported RAID drivers ...
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1answer
36 views

Recovery from multiple disk failure using RAID level-6 [closed]

How to find a RAID level 6 scheme with ten disks such that it is possible to recover from the failure of any three disks simultaneously? Actually the question is from the book: Database System ...
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1answer
77 views

Windows Server 2008 RAID setup

I have a relatively old Windows Server 2008 machine that I am upgrading the disk space on. The disk hardware I am upgrading to is: 2TB WD - WD20EARX 2TB Seagate - ST2000DM001 1TB Seagate - ...
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0answers
34 views

How much usable space will a 2TB+2TB+3TB+3TB btrfs filesystem have with data in RAID-1 mode?

I have a pair of 3TB drives in a btrfs filesystem, and I wish to expand this filesystem by adding two more 2TB drives, using the btrfs device add command. Data in the current filesystem is mirrored in ...
0
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1answer
80 views

RAID1: approx performance difference of 3 active vs. 2 + spare?

My question concerns only Linux software RAID ("md"). I'm going to set up a RAID1 array with three devices. I need to choose between using the third disk as a spare or as an active member of the ...
0
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0answers
31 views

Write cache settings not working

I am using Debian 8.0 x64 with 72 GB of RAM with 4 drives configured as software RAID 0. Linux s1 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1 (2015-05-24) x86_64 GNU/Linux I tried setting dirty ...
0
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1answer
69 views

SATA Hard disk on RAID controller does not show on windows, and healthy on BIOS

We have a WIN2012 R2 server (3 x SSD 1T each, 1 x SATA 2TB), each drive is being put on it's own RAID (reads 4 "Adaptec Array SCSI Disk Device) on device manager in windows "disk drives" section ...
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0answers
20 views

load balancing in multiple hardware raid arrays - soft raid 0 acceptable?

We have a central storage server (PowerEdge R720) serving shared files to an HPC cluster, and it has two hardware RAID controllers attached (PERC H810, each driving 2 MD1200 enclosures filled with ...
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1answer
51 views

How can I get my Dell R300's PERC 5e RAID Controller Back Online?

Intro/Problem Hi everyone, I am in over my head here. I have a Dell R300 server running Windows Server 2003. It went down late last night and upon trying to restart it, I got the following Errors ...
3
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1answer
199 views

Mixing SATA speed on hardware RAID

I have a 16 drive hardware RAID array which has 15/16 3 Gb/S SATA drives. On replacing a failing drive I realized the replacement was a 6 GB/S drive (same brand/cache,size though). Is this likely to ...
2
votes
1answer
65 views

Mounting degraded RAID

I've finally managed to assemble my RAID10 array again. I'm hoping there might now be a way through this. (There is history, if anyone is interested). I'm now getting: # cat /proc/mdstat ...
1
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1answer
36 views

SSDs with the Intel RMS25CB080

I've bought a new server which only allows disks to be connected to a built-in Intel RMS25CB080 RAID controller card. The server has 8 2.5" slots. I'm considering using SSDs with this server, however ...
0
votes
1answer
109 views

OpenZFS on OSX filesystem dataset performance issue

tl;dr - My ZFS RAIDZ2 array reads at 7.5+ GB/s and writes at 2.0+ GB/s when I specify a bs=128K or greater with dd. OS X is assuming 1K (as per stat -f %k .) and all my is ~300MB/s; dd gives the same ...
0
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1answer
153 views

CentOS 6.5 Installation in HP Proliant DL80 Gen 9

I have created 2 Logical Disks, 1 with RAID 0(1.8 TB) another with RAID 1+0(5.4 TB). I have to install CentOS 6.5 in the server, but while installing the OS, I cannot detect any logical disks to ...
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2answers
150 views

mdadm, RAID5 all disks marked as spare, won't start

RAID5 config with mdadm and 4 disks After some incidents, eg one of the drives was lost, had to reboot the server and rebuild the array, my raid is in a funny situation cat /proc/mdstat ...
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0answers
39 views

Windows Server 2003 R2 - Adaptec Storage Manager email notification not working

I'm having problems with the Adaptec storage Manager email notification. It can't send emails to recipients, always showing an ERROR message. Seems that the problem it's related to some java voodoo ...
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2answers
103 views

How to fix my broken raid10 array

I have a RAID 10 consisting of 4x3TB drives. It had become degraded (sdd had dropped off). I thought I had fixed it and it was rebuilding, but now (I think) sde appears to be causing problems. ...
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0answers
67 views

Mount a NTFS Raid0 disk under linux debian

In my new laptop I have a a RAID 0 configuration with a normal disk and a smaller SSD drive. I have removed the dvd bay and replaced the dvd player with a 256 GB SSD drive where I run linux debian. I ...
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1answer
65 views

RAID 5 reshape freeze

I recently added a new disk to my RAID5 array and started growing it. Absent minded as I am I rebooted the server during this reshape process I as another program was hung and blocking some ports. ...
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0answers
13 views

Outdated files after Server 2008 RAID1 failure

I have a server running Windows SBS 2008 with 2 HDDs in soft RAID-1. Today some kind of RAID crash occured - the server could not boot saying there're no bootable device. I removed both drives from ...
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2answers
41 views

Converting from RAID 1 to RAID 0

We have 2 x 600GB SAS 15K drives configured in RAID 1 through a PERC H710 RAID controller in a PowerEdge R620. Question. Can we convert this to RAID 0 without having need for a OS reinstall? If so, ...
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1answer
46 views

Proper way to identify member devices in mdadm.conf

My current mdadm.conf looks like: $ cat /etc/mdadm/mdadm.conf DEVICE /dev/sdb1 /dev/sdc1 ARRAY /dev/md0 metadata=1.2 spares=0 UUID=357ff7cc:55e78d18:9fc7917b:f5b253f2 MAILADDR me@example.com Since ...