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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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Unable to use/mount the full size(20TB) of configured RAID5 array on centos7

Actually i have created software RAID 5 array md0 using mdadm linux. In this configuration i have used 6 Harddisk (4 TB each) and the final raid5 array size is 20TB approx. As we know raid 5 use n-1 ...
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2answers
248 views

mdadm RAID5 random read errors. Dying disk?

First the long story: I have a RAID5 with mdadm on Debian 9. The Raid has 5 Disks, each 4TB of size. 4 of them are HGST Deskstar NAS, and one that came later is a Toshiba N300 NAS. In the past days I ...
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1answer
71 views

Unable to mount a RAID 5 volume

Evening all, Total n00b when it comes to Linux, I use Xpenology (Synology) as NAS software and following a faulty SATA cable lost my RAID 5 volume - within the OS it's sat in a crashed state. ...
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1answer
67 views

Recover from a clean, degraded RAID-5

Good morning all, I have some NAS software which - for the most part - works great, but when something happens to the Hyper-V host it often fails spectacularly. Today is one of those days. I'm not ...
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1answer
22 views

MegaRAID SAS 2108 - Can I use different drives for the same array

I know you can in general use different drive manufactures and size in general but does anyone know if the MegaRAID SAS 2108 card will let me do RAID 5 with multiple drives that are not the same in ...
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10 views

I/O Lockup after RAID5 Volume finishes synchronising

I have a Windows Server 2012 R2 box with a software RAID5 volume (4x 4TB) but for the past few weeks I've been having relability problems with the server where all I/O locks up and I'm forced to reset ...
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1answer
43 views

Recovering formatted Microsoft Storage Space Raid-5

I have accidentally formatted my Storage Space. The setup is 3 units of USB 3.0 Hard drives with 4TB each. Total 7.4Tb of storage available. I have used Active File Recovery with no success.It finds ...
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1answer
29 views

Poweredge 730xd Replace RAID 5 disk with alternate model?

I have a Dell Poweredge R730XD with 24 x 1.2tb ST1200MM0088 (2.5, SAS 12Gbp 10K) disks in multiple raid 5 partitions. One disk has failed - I have a brand new ST1200MM0099 disk available to replace ...
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1answer
31 views

highpoint rr640l raid 5 status disable, having difficulty with recover

I have been using a Highpoint RR640L controller (at BIOS version 1.5) for a couple years or more on my primary system. The RAID-5 volume contains 4 disks, 2TB each. This week, one of the disks ...
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0answers
11 views

Lenovo RD640 RAID-5 Expansion

I have a Lenovo RD640 server configured for 2.5" drives. I have a RAID-5 array with 3 x Seagate 600GB 10K SAS 2.5” (ST600MM0006). I urgently need to expand the RAID as a temporary measure, but ...
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1answer
72 views

Which Disk to replace first ? Predictive Failure or Failed Disk [closed]

We have a HPDL380 G6 server ( running 2003 R2) with 1 failed disk and 1 predictive failure. Total 4 Disks configured with RAID5. I will be replacing disks, Now question is which disk should I ...
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170 views

RAID 5 Physical Disk shows Foreign status on Dell OpenManage

I have a DELL PowerEdge 2950 Server which has 6 Physical Hard Disks. First 4 HDD are configured as RAID-5, and the rest two are configured as RAID-1. From last week, third hard disk of RAID-5 shows ...
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52 views

RAID 5 to 2x RAID 1

Is it possible to convert RAID 5 to 2x RAID 1 without any data loss? Example: 3x 1TB HD in RAID 5 + 1x 1TB like Hot Spare convert to 2x 1TB RAID 1 + 2x 1TB RAID 1
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55 views

Add drive into a new bay as replacement of failed drive in RAID5 - Dell T610, PERC 6/i

I have Dell T610 with PERC6/i controller (on Windows 2012 R2). It is running RAID 5 array consisting of 4 drives (bay: 0,1,2,3). Recently disk in bay:2 failed. So we have sourced a replacement but ...
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1answer
36 views

How to diagnose/fix slow file management on Windows Server 2012?

The setup is: FUJITSU PRIMERGY TX300 S7 RAID Ctrl SAS 6g 5/6 512mb (d2616) Windows Server 2012 64 bit Volume C: RAID 1 (2 HDDs) Volume D: RAID 5 (8 HDDs) The problem is: When we do ...
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1answer
36 views

Raid 5 failure on P400i Controller

I was hoping for some help. My server won't boot up into Windows and I get the following errors: 1794-Slot 0 Drive Array - Array Accelerator Battery Charge low Array Accelerator Posted-Write ...
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1answer
278 views

How can I do extend logical volume on lvm raid 5

Sorry about my broken/bad english... I have 3TB 4 disks on lvm2, and created lv with raid 5. I added new 2 disks on my volume group and tried to extended lv. but it wont work. Here is my vg status. ...
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2answers
123 views

Can I replace a drive with a slightly smaller one in a RAID5 array?

I've got an ancient Dell server with 4 disks in RAID 5. One has become faulty and needs to be replaced. I ordered an identical model drive but when it arrived it is slightly smaller. The RAID ...
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1answer
74 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 ...
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3answers
901 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 ...
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1answer
57 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 ...
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1answer
612 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 ...
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2answers
55 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
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0answers
51 views

Will my reshape result in an unrecoverable array?

I was adding an additional new drive to 4 drive raid 5 mdadm array. During the process that drive was marked as faulty, along with one of the original 4 drives. Previously to this the array had ...
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0answers
106 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 ...
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2answers
384 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 ...
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2answers
17 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 ...
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0answers
120 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 ...
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2answers
159 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 ...
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66 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] ...
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1answer
204 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 ...
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3answers
6k 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 ...
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1answer
395 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 ...
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1answer
148 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 ...
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2answers
179 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 ...
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0answers
53 views

RAID data Reinitailize

I am having 1TB 3 hard-disk in RAID-5 and suddenly one of my hard disk is corrupted. So, I add new hard disk and corrupted hard disk data reinitialize in new hard disk. So my question is shall I use ...
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2answers
122 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 ...
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1answer
112 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, ...
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1answer
190 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 ...
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2answers
325 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 ...
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1answer
52 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 ...
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2answers
1k 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 ...
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2answers
256 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 ...
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2answers
852 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? ...
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2answers
875 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 ...
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4answers
972 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 ...
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1answer
3k views

MD, partially grown from RAID1 to RAID5 but was interrupted, disks removed, and now file system is FUBAR

I know that I made some stupid moves to get into this situation, please don't remind me, and don't ask why :-/ I have this Synology DS1515+, with 2x6TB drives in SHR, which means MD RAID1, with LVM ...
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2answers
2k 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 ...
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3answers
162 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 ...
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1answer
3k views

How do I extend a RAID5 array with storcli?

I just bought a new disk. How do I extend an existing RAID array without losing data?