Questions tagged [raid5]

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 redundancy and performance (via parallel communication) is required. RAID 5 is a specific implementation.

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Missing VirtualDisk on bootup (RAID)

I have a Dell PowerEdge 2950 with DAS storage attached (MD1000) I rebooted the server to apply window updates (win2008), on restart BIOS detected a VirtualDisk was missing and wanted me to continue or ...
1 vote
1 answer
115 views

Teaming a drive in multiple RAID groups [closed]

I've setup a home RAID for a friend in the past from a heap of old and new 2T and 3T drives. seems very much like what BeyondRAID does. I made a 7 member RAID5 group of the 2T volumes and the first ...
9 votes
3 answers
1k views

DL380 G5, RAID5, ext3, RAID Failed

We have an old HP DL380G5 server, with 5 300GB SCSI 3.5'' disks in a RAID5 array, in an external bay, formatted as a logical volume with ext3 filesystem, that hosts 1.2 TB of sensitive clinical ...
0 votes
1 answer
192 views

Is it possible to extract Raid Controller configuration index from on to another?

We have a Fujitsu server with this specific RAID Controller (FUJITSU PRAID EP400i / EP420i). We want to export the configuration of that RAID Controller to a new one, so in case that RAID controller ...
0 votes
1 answer
2k views

Disadvantages of more RAID 5 arrays in a RAID 50 array

We have a 24 disk SAN, currently configured in RAID 50, with a RAID 0 stripe across two RAID 5 arrays with 11 disks in each RAID 5. The two remaining disks are allocated as hot spares, one for each ...
4 votes
2 answers
389 views

Raid 5 Recovery Process

I just recently setup a 3 drive 4TB MDRAID 5 array for mirroring and an online backup of our server. I am preparing for a future hardware (drive) failure and wanted to mitigate a recovery failure ...
-1 votes
2 answers
212 views

Recover files from one of three mdadm RAID5 disks

I have lost 2 of 3 mdadm RAID5 disks. How can i recover whatever files are available on the remaining one disk? Sundeep
0 votes
0 answers
206 views

7-disk RAID 5 working with only one disk? Bug?

I've got a 7-disk RAID-5 (3TB each), on a CentOS 5.5 box. Today I was doing regular checkups on my system and found this weird bug(?): How is this possible? This filesystem is formatted as XFS and ...
6 votes
2 answers
2k views

Fix RAID 5 with two drives containing bad blocks [closed]

Assume the following situation: An administrator was not careful enough maintaining a NAS server (QNAP QTS 4.3.3) using RAID5 and it has already reached a situation in which two (out of four) drives ...
0 votes
2 answers
61 views

orphans inodes after some time -> ro mode

Background On an X3500 IBM server with debian jessie one of the 4 SAS disks in the hardware RAID 5 (made with the server controller) is damaged. From that moment sda1 (one of the resulting partitions ...
0 votes
0 answers
459 views

raid problems after power outage

I was in the middle of copying data to a raid5 from a raid 1 when the power went out. Initially, I figured the raid was lost, so I zeroed the super-blocks. fdisked all the drives in the raid 5 and ...
0 votes
2 answers
788 views

Replace failed HDD Raid 5 with different size

One of the HDD on my server HP proliant DL 380 G7 failed, i have 6 hdd each 146gb sas 2.5 Hot plug. Can i replace one HDD failed with larger size 450gb sas 2.5. Is the safe? And how the scenario for ...
1 vote
0 answers
332 views

mdadm raid5 disk disabled, state clean, smart passed

i'm running a raid5 array with 5 disks. One disk got disabled. dmesg : ... [Tue Dec 5 01:02:08 2017] md/raid:md0: read error NOT corrected!! (sector 15263288 on sdb1). [Tue Dec 5 01:02:50 2017] ...
3 votes
1 answer
834 views

Remove two physical drives from raid 5 array (4 disks)

I'm using a G6 hp server with 4 physical drives and p410 raid controller. I set up raid5 array with 3 physical drives,but one of them has been failed and becouse of this, I am in the Interim recovery ...
3 votes
3 answers
26k views

HP RHEL Array Raid Disk Status from command line

I've configured a HP DL360 Gen 9 with 6 disks and raid 5 and i've installed RHEL 6.9 on it. I need to know, from command line, the status of every single physical disk so i could grep info to an ...
1 vote
1 answer
1k views

HP DL380 Gen 9 + P440ar + SSD

I am looking at installing 4 HPE 480GB SATA 6G SFF SSD in a DL380 Gen 9, running a P440ar smart array controller. The plan is to run a RAID 5 volume, then install Windows Server 2016. Is RAID 5 the ...
4 votes
1 answer
2k views

Server hangs on file copy

We are having an issue with one of our servers. When we copy bigger files (large means 50MB and larger in that case), the copy operation (C:\ to C:) starts normally, but then starts to lag, going down ...
1 vote
2 answers
10k views

QNAP TS-859U+ RAID5 volume unmounted, e2fsck_64 hangs

We got this QNAP TS-859U+ with firmware version 3.8.1 Build 20121205 at our datacenter. It has Intel(R) Atom(TM) CPU D525 @ 1.80GHz processor and 1GB RAM, 8 of 3TB (Seagate ST33000651AS CC44) drives ...
5 votes
4 answers
13k 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 hard ...
0 votes
2 answers
489 views

NAS RAID 5 HDD recovery

I have a broken NAS. The system is not broken but the hard drive is. The NAS system is ASUSTOR AS5108T with 8 bay of HDDs. The NAS originally purchased with 8 units 3TB WD GREEN (I know it is wrong to ...
1 vote
1 answer
401 views

Windows Server 2008 Restore to RAID 5

Firstly, I am very new to storage and RAID setups so forgive my basic understanding of this. I have a Dell PowerEdge R720 running Windows 2008 R2 Server with three physical HDDs and no RAID setup, ...
2 votes
1 answer
833 views

LVM RAID 5 not resulting in logical volume size expected

I'm having an issue with LVM RAID 5 not allowing me to create a LV that uses the space on all four drives in the VG. What is particulary annoying is that I create fthis very same VG/LV using the same ...
2 votes
2 answers
7k 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 ...
0 votes
2 answers
1k views

How to Shrink Raid 5 SAS to 3 Local Disks on windows server R2 2012?

I've installed Windows server 2012R2 on HP ProLiant with 5 SAS Disks (300GBX5). after configuring Raid 5, the total visible size became 825 GB as Disk C. Is it alright? if i want to create Disk D and ...
0 votes
1 answer
147 views

Is it not possible to use 4x1TB disks in RAID5, when booting from the same VD?

I've just got a couple of 2010 Dell servers. One of them has 4x 1TB disks. I configured them in the RAID controller to use all of them in RAID5 to give me 3TB of storage + 1TB for parity. There are no ...
2 votes
2 answers
9k views

HP Smart Array 5i Interim Recovery

Seemingly without cause the server suddenly stopped working. On reboot, it says one or more logical drives has failed. Drive #1 is the C drive with the OS and Drive #2 is the data drive. It shows ...
0 votes
2 answers
477 views

Why would a RAID5 rebuild fail?

I have a IBM System x3650 server with a ServeRaid controller and two RAID5 arrays, each consisting of 3 disks. Yesterday, one disk failed (It was the Raid array that holds the data, the system is ...
-3 votes
2 answers
2k views

Why is a double disk failure an issue for a 5 disk Raid 5 configuration?

Based on this question about RAID-5 for 5 disks: Two disks failed simultaneously? Sorry if I butcher some of the terminology Why is a double disk failure an issue for a 5 disk Raid 5 configuration? ...
1 vote
2 answers
2k views

Does R710 with PERC H700 auto rebuild single drive in raid 5?

I have a Dell PowerEdge R710 with PERC H700 Integrated BIOS Configuration Utility 2.02-0025.1 I have a raid 5 setup, and recently I noticed one of the hard drives blinking amber/green, which ...
2 votes
4 answers
4k views

RAID 5 for SSD drives.

I am planning to deploy a cost efficient yet performant SAN/NAS setup for our main office. Use cases: storage for a 20-30 user VDI deployment, file server, primary backup location. Required usable ...
10 votes
2 answers
3k views

Raid 5 Hard disk corruption

I have got IBM x3650 M4 server. It is configured with Raid 5 & includes 4 SAS hard disk with capacity of 500 GB each. Now the 2 Hard disk are showing as bad. So by replacing the 2 hard drives ...
2 votes
3 answers
33k views

"Parity Initialization Status: In Progress" for long time

Two weeks ago I installed 6 new hard disks (HP 500GB 6G 7.2K SFF 2.5-inch 2-ports SAS DualPort Midline, 507610-B21) in a "HP DL 380 G5" with a "Smart Array P400" (RAM Firmware Revision 2.08, ROM ...
22 votes
8 answers
76k views

RAID-5: Two disks failed simultaneously?

We have a Dell PowerEdge T410 server running CentOS, with a RAID-5 array containing 5 Seagate Barracuda 3 TB SATA disks. Yesterday the system crashed (I don't know how exactly and I don't have any ...
0 votes
3 answers
335 views

RAID5 Data Recovery on PowerEdge

First off, sorry for my poor english. Okay? So, folks, my DELL PowerEdge R420 is stopped. It's RAID-5 designed with SAS x4. But, two drives are in trouble: One is under S.M.A.R.T. error. The other ...
4 votes
1 answer
10k views

HP Code 341 "Physical Drive State: Predictive failure. This physical drive is predicted to fail soon."

this is my first post so bear with me here :-) Background: I have a RAID5 setup with 4 disks that have been working perfect for years. After one drive failed, I installed new drives which where ...
0 votes
1 answer
788 views

StorCli Wrong Physical Disk Size

I am using a 2008 MegaRAID SAS 8888ELP. I was unable to boot into webbios, although I was able to install storcli onto my arch linux setup. The raid works well although I am new to using raid and ...
1 vote
0 answers
71 views

raid5 disk degraded partition detached

I'm having a problem with my raid5 disk. I already had disk failures and replaced disks without any problem, but this time I'm having a hard time fixing it. Here is the situation : I am running ...
0 votes
1 answer
1k views

Is it possible to clone raid member disks in an array with dd

I'm looking to expand the capacity of my qnap NAS by tripling the drive size from 2TBx8 to 6TBx8. However, I'm afraid the raid 5 will die before I can rebuild the array 8 times!! Can I remove and ...
2 votes
2 answers
2k views

What happens if i remove a perfectly working disk from a RAID 5 and just put it back few minutes later?

Does the controller recognize it, keeping the data on it? or it starts rebuilding the raid as if it's a new disk?
0 votes
0 answers
313 views

Drive replaced in RAID5 not automatically syncing, instead showing as spare

Replacing the drives in a RAID5. sdb failed, replaced it. Things went well. Now I'm replacing sda, but after being added to the array it shows as a spare and doesn't sync. Steps followed: mdadm --...
0 votes
1 answer
78 views

Dell PowerEdge 2900 with a faulty disk (among a Raid 5 array). Can I replace it with one with a different firmware?

The original Seagate ST3146855SS disk is running firmware 515, while the one I'm going to buy has a more recent firmware. All other features are the same (15K5, 146Gb) Will the controller just ...
-1 votes
2 answers
4k views

Install Windows Server 2012 on separate disk or in RAID 5?

I have a RAID controller with 4 1TB disks and first I put them all in a RAID 5 array, partitioned 1TB for OS and 2TB for data. Then I noticed that the raid array was never idle. It was constantly ...
0 votes
0 answers
629 views

How much cpu (and RAM) is used to rebuild an Intel RSTe RAID 5 (firmware/bios/fake)?

Let's say I have a dual CPU system with: 2 x Intel Xeon E5-2667 v4 3.20GHz 25MB Cache 3 x 1TB SATA3 Seagate Enterprise class in RAID5 on the Intel C612 RSTe Controller Total final storage is: 2TB ...
0 votes
6 answers
5k views

Normal Speed for SAS RAID5

Can't understand why writing speed on 10xHDD SAS bulided in RAID5 is too slow. Read Cache: Enabled Write Cache: Disabled (server has no battery) Strip size: 512k --------------------------------------...
1 vote
2 answers
1k 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
1 answer
41 views

Random drive loss about every 24 hours

I have a megaraid 9260-8i with a 4 disc raid 5. For 6 months or more the array has been performing beautifully, but recently the hardware alarm went off and the status said one of the drives was ...
3 votes
2 answers
4k views

Is it possible to update stripe-width on an existing, and used, ext4 fs?

I have a RAID 5 with 5 3TB drives (8 in few weeks), on a Debian. There is only one ext4 partition on it, using all the space available. Actually, due to origins of the RAID (4 drives), the ext4 fs ...
3 votes
1 answer
3k views

how to determine which drive belongs to which slot on raid 5

i have an HP DL380 G8 machine with 4 hard drives of same size and running on raid 5. unfortunately during a service process of our data center one of the junior team members pulled out all four hard ...
0 votes
0 answers
232 views

Unable to add drive as active to array

I swapped out a failing drive using the following tutorial First I removed the drive with: mdadm --manage /dev/md0 --fail /dev/sdc1 mdadm --manage /dev/md0 --remove /dev/sdc1 Added and formatted ...
3 votes
2 answers
8k views

RAID5 array Ready for Rebuild

I've inherited administration of a server with a RAID 5 array. We have a damaged database on the array that is just over half the allocated size, so makes recovery impossible. I recently changed the ...

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