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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10
votes
2answers
831 views

Why is my RAID1 read access slower than write access?

I have done some simple performance tests and it seems that reading from my RAID1 is slower than writing: root@dss0:~# for i in 1 2 3; do dd if=/dev/zero of=/dev/sda bs=1048576 count=131072; done ...
2
votes
1answer
24 views

EPC mode on Seagate Constellation using Linux

I need to set EPC mode on Seagate Constellation disks connected to LSI 9690SA-4l controller. This is because the controller is not compatible with the disks unless the EPC mode is set – according to ...
-2
votes
1answer
108 views

Data recovery from deleted raid array

Hello I deleted a raid 1 array on a hp b110i and I wanted to know if it is possible to recover the data. Also if Windows server was on the array that was deleted can it be recovered. Thanks
0
votes
2answers
44 views

LSI MegaRaid live conversion from RAID 6 to RAID 0+1

I've currently got a lovely working server that has an LSI 9265-8i RAID card in it with 4x1TB RE4 drives, also running CacheCade Pro 2.0 with 2x180GB SSDs in RAID1. I currently have the main array ...
-1
votes
1answer
70 views

Fixing partition table after writing 0s to beginning

I have a sw raid10 setup like: /dev/sdX > partition /dev/sdX1 > raid md0 > lvm > fs. I'm an idiot, and wrote 4gb of 0s to /dev/md0 with dd dd if=/dev/zero of=/dev/md0 bs=4k count=1000000 ...
3
votes
1answer
147 views

Steady red light on 2 HP SAS drives in RAID 1

I have a HP ProLiant web server with two HP 300GB SAS SFF 2.5 inch drives (Model: HP 507127-B21). Both drives have a solid red light, however there is no indication within the management software that ...
0
votes
0answers
34 views

Why MegaCli always returns blank?

Similar to this question (MegaCLI always returns blank output) with some differences. I am using perc h710p raid controller on Dell Ubuntu box. I download 1.01.39_Linux_Cli.zip (according to ...
1
vote
1answer
73 views

HP ML350 Gen8: error erasing disk cciss/c0d0 on PXE

I Have a ML350 Gen8, that on first PXE Boot, will ask me whether I am sure I want to erase raid controller cciss/c0d0 giving me an option of Yes | No. This only happens when the disks are brand new ...
1
vote
2answers
799 views

Will expanding my Synology Hybrid RAID delete the data on the initial disk?

As the title states, I currently have my Synology NAS with a single 4TB drive in it. I now wish to expand this with another 4TB drive. If I expand the volume (it's currently setup as SHR) will the ...
0
votes
0answers
50 views

openSUSE encrypted root over RAID, given Yast doesn't support encrypted root?

This is for a fresh install of 13.1 I'll be making. Four drives in RAID10 need to be on the bottom. I'd rather the RAID be software, MD, rather than hardware, though I'd use hardware RAID if all else ...
0
votes
1answer
92 views

Repair or recreate virtual drive on raid array

I have raid array intel srcsas18e. Today I saw that OS was shutdown and status two hdds is "foreign unconf bad". Both hdds were in one virtual drive. But I do not find this virtual drive in a config. ...
0
votes
1answer
40 views

Read RAID disks on another RAID adapter

I have a server with a failed motherbord. The motherboard has an embeeded Adaptec RAID controler. The server has 3 SCSI disks in a software RAID5 array (so the RAID controller is used only as a SCSI ...
0
votes
0answers
30 views

IBM x 3650 M4 - enable disk slots 4-7

I have a x3650 with a ServeRaid 5110 controller. I have six disks installed - first 3 as one RAID5 array, and I want to set the second 3 up as another RAID5 array. However, only slots 0-3 seem to be ...
0
votes
1answer
549 views

Kernel panic after boot Centos 6.5 HP DL320 B120i HPVSA

Im working with a new HPDL320 micro server (gen8-2) with a HP Dynamic array B120i My problem is after the setup. I provided the DiskDrive to the installer and everything is fine. at first i used kick ...
-1
votes
1answer
80 views

Adaptec configuration has changed - Why can't it show me what it sees before blindly “accept” or “reject”ing?

I work with Adaptec cards on a regular basis; 2405, 5405, 6405e, 6805, and a few others. I am dismayed by the BIOS' terseness and lack of any utility at all. I can set card setting toggles; but the ...
1
vote
1answer
75 views

Software-RAID with ext4 but without 64bit support

last year I set up a Software-RAID5 with 5x3TB yielding 12TB of usable capacity. Just today, needing more storage, I have finished growing the RAID to two more 3TB disks: Personalities : [linear] ...
0
votes
1answer
160 views

Reconstructing the disk order in RAID 6 with 7 disks

a little background to this question first: I am running a RAID-6 within a QNAP TS869L external RAID/NAS system. I started with 5 disks of 3 TB each back in the day, and later added another 2 disks of ...
0
votes
1answer
105 views

Degraded RAID1 on debian 7.5

I am in a bit of a problem with my root server and a degrading RAID. Unfortunately, I'm no expert when it comes to RAID. System informations: Debian 7.5, SSD software RAID1, problem occur since a ...
1
vote
0answers
197 views

SuperMicro 119-7 - Install Problems 'no device driver found'

I have a set of servers that had Debian installed, and need to have Windows Server 2012 R2. Supermicro 119-7 / 10274-WRFT+ MegaRAID SAS 9266-8i Mount R2 in a flash drive, boot from it in UEFI mode ...
0
votes
2answers
152 views

Move OS from RAID5 array to RAID 1 arrays

I want to give a last boost to my old ProLiant ML350 G5 server which just needs to be reliable for a few more year only ! With a defined budget of about 1500$ (I do not have more), i plan to replace ...
1
vote
1answer
68 views

Anyone tried dd'ing Raidmembers?

I want replace all disks in a 10 disk raid6 (linux software raid). I could do this by pulling a disk, let the array rebuild, rinse, repeat. But this would take a very long time, and cause 10 ...
1
vote
0answers
269 views

Dell PERC 6 - virtual drive goes offline because a drive went into the “ready” state

I have a Dell PowerEdge 2950 with four drives, and this raid controller (Dell Perc 6/i): lspci -nn RAID bus controller [0104]: LSI Logic / Symbios Logic MegaRAID SAS 1078 [1000:0060] (rev 04) ...
0
votes
2answers
121 views

RAID Configuration & File System - What to RAID 1 and what to RAID 0 [closed]

I recently received my first server - it is a HP ProLiant 320e G8. I've installed Debian Wheezy on it. I had to disable the HP Smart Array controller (B120i) because it was creating problems with the ...
1
vote
1answer
73 views

How to copy RAID 1 HDDs from one server to another Identical server

I have one IBM X3100M4, type 2582 windows server and having 2 x 500 GB HDDs in RAID Copy. Now brought new server and having blank HDDs. How can I copy RAID HDDs from Old server to new server? I have ...
0
votes
1answer
47 views

Missing partition from RAID 0 array - what can be recovered?

System is Fedora Linux, there is RAID 0 array set up via mdadm that have bound together partitions /dev/sda4 and /dev/sdb4. Lately, /dev/sdb failed and became unreadable. Naturally, I started ...
3
votes
1answer
117 views

Are FC and SAS DAS devices standard enough?

Before I ask my questions, here is some background info that may or may not be useful: For the first time I find myself needing a DAS solution. My priority is data through-put in a single direction. ...
1
vote
2answers
577 views

HP Server with P420i - Migrate to RAID 5 Error

I have an HP DL360 G8 with a Smart Array P420i with 3 physical drives, currently setup RAID 0, I would like to migrate to RAID 5. When using the Smart Storage GUI when I attempt to migrate the ...
0
votes
1answer
33 views

Raid1+0: create stripe over two /dev/mdx on partition or not?

Given that I haven't found a way to define how a Raid10 is created with mdadm, i went the Raid1+0 solution. How to display/define Mirror/Stripping pairs with mdadm mdadm --create /dev/md0 --level=1 ...
-2
votes
2answers
713 views

Dell Power Edge R515 - Replacing a Bad Hard Drive in a RAID

I've ordered a new hard drive to replace a bad one in a Dell Power Edge R515. The manual covers obvious topics regarding physical replacing of hard drives, but I've never done this before on a ...
2
votes
2answers
116 views

When to use hot-spare?

On my newly purchased HP MDS600 with 70x 4TB Nearline SAS disks, I now need to configure the disks, and I want raidz2, so the raid sizes follows 2^n+2. The options I therefore have are 7 raid sets ...
1
vote
1answer
106 views

How to display/define Mirror/Stripping pairs with mdadm

I want to make a standard linux software Raid10 over 4 HDD. The server has 4HDDs, 2 pairs from different vendors in order to avoid batch problems. I want to have the mirror over two different ...
4
votes
2answers
314 views

What steps should I take to best attempt to recover a failed software raid5 setup?

My raid has failed, and I'm not sure what the best steps to take are in order to best attempt to recover it. I've got 4 drives in a raid5 configuration. It seems as if one has failed (sde1), but md ...
0
votes
1answer
90 views

How to set two RAID1 on the HP SA-E200i controller?

I have an HP ML350 G5 with a RAID 1 between two SAS disks. I want to add 2 extra disks and configure a new RAID 1 separated from the other one. Reading this topic Multiple RAID arrays on E200i it ...
1
vote
1answer
336 views

Migrate Windows Server 2008 R2 to a RAID 1 Configuration

I have a Dell PowerEdge T110 server running Windows Server 2008 R2. It is a DC (among many other things) and runs my home network, but after 4 years in operation I am starting to get worried about ...
2
votes
1answer
126 views

Best practice on hot-swapping disk

I've been putting myself to find an learn more about the product before posting a question. Well, I've tried my luck and didn't got a proper answer to my questions. So I'm posting it here. Had an ...
1
vote
3answers
83 views

4 Disk - RAID(5) - 1 alleged faulty drive

I have a OWC Mercury Pro Elite Qx2. I have 4 4TB Hitachi drives setup on a RAID 5. One day, the red light came on indicating that my C drive has failed. I took it out, and put it on my docking ...
0
votes
1answer
90 views

How to view progress in ESXi of RAID recovery

We have a RAID configuration. After a failure when a new hard drive is being written to, is there a way to use ESXi to view the progress so we know how much longer until completion?
1
vote
1answer
74 views

LSI Raid 5 with 2 disks “not synced”

I have a system with a LSI 1064e SAS raid. The system is not booting, and when I enter the raid configuration utility, It says, that has 2 disc "Not synced". I didn't find the option to resync them, ...
2
votes
0answers
142 views

Solaris 9: Degraded mirror unmanageable with raidctl after drive replacement

We have a pair of Sunfire v20z's (WITH LSI MPT raid) that have each had one drive in their mirrors die. bash-2.05# cat /etc/release Solaris 9 4/04 s9x_u6wos_08a x86 ...
1
vote
3answers
102 views

3ware Raid Controller - Wrong Size after upgrading one disk

I have a 3ware raid controller. I replaced both 750GB disks by new 1TB disks. But the unit size is still 698GB. How can i "resize" the unit size to use the 1TB size. Screenshot: ...
1
vote
0answers
92 views

Upgrade Raid 1 to Raid 0+1 and bootloader issue

I am trying to convert my current RAID 1 to RAID0+1 and facing issue in installing bootloader - please have a look what i am doing. My current configuration is RAID1(2*10GB): [root@localhost ~]# ...
5
votes
4answers
782 views

RAID level confusion (MegaCli vs megasasctl output)

I'm utterly new to working with LSI MegaRAID controllers and I'm confused as to what RAID level I am actually running. My server is equipped with 4 disks, 4TB each and I would like to have them ...
2
votes
2answers
312 views

Combining SSD and HDD in HP dl380p?

I´m planning to buy a dl380p with 25 sff slots with 2 ssd:s raid 1 and 10 hdd:s raid 5, having room for 13 more hdd:s in the future. Is this possible or do I need two raid cards?
3
votes
2answers
220 views

Upgrading RAID controller to 4kn - do I have to reinitialize the array to use 4kn?

I have an enterprise-grade workstation with an Adaptec 6405E RAID controller in it. According to Adaptec, this RAID controller does not, and will never be able to, natively support 4K disk sectors. If ...
1
vote
2answers
2k views

mdadm Boot Error, incrementally starting raid array Ubuntu SErver 14.04

i build a small Server with Ubuntu 14.04 for Samba, I has one SSD Drive (the ubuntu installation is on it) and 2 3TB SATA Disk, the sata disk are combined to a Raid 1 with mdadm. Now sometimes (no ...
0
votes
2answers
64 views

Transfer from RAID-1 to RAID-0 — easy as cloning?

I have a RAID-1 of 1TB drives using on-board RAID. I have 2 new 240GB SSDs I want to place in RAID-0. This is Windows Server 2012. I know with disk cloning/transferring that it is important going ...
0
votes
2answers
2k views

What is the performance implication of hardware vs software RAID in 2-disk RAID0/RAID1 setup?

I am choosing between two similar models of servers, one of which has software RAID, while the other hardware one. Servers in question are SYS-E32-1 and SYS-E32-3 from So you Start (an OVH brand) and ...
-1
votes
1answer
39 views

Server Raid Failure and Boot into Grub

My server failed and and was booting into grub rescue. Now it is saying it cant even find the OS. I went into bios and checked the drives, and none of them seem to have failed. In the system events ...
2
votes
1answer
189 views

Large write with dd fail on RAID-5

I have a server with a RAID controller which connects to a JBOD over SAS. JBOD is populated with 16 SAS-HDDs of 3TB (8 of one make and 8 of other, same rpm). I have configured 3 logical drives with ...
0
votes
1answer
237 views

Windows Server 2012 issues configuring 8TB raid array

I've just restored an image of our default server config on a DELL R710 with a H700 raid controller. The controller has a single raid 5 array of 5*2TB disk + 1 Hotspare. Windows boots just fine, but ...