Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [raid1]

RAID 1 or Mirrored RAID uses two or more disks that store the same data.

RAID Level 1 or mirrored RAID uses two or more disks that store the same data. One disk is mirrored to the other. Write speeds are the same as using one disk, and read speeds are twice as much.

RAID 1 is used when reliability needs to be higher than normal.

Related Tags:

507 questions
0
votes
2 answers

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 from small to bigger sized disks. Do I need to drop…
Jason
  • 3,931
  • 19
  • 66
  • 107
0
votes
2 answers

Disk Capacity RAID 1 to RAID 10

I have a 4-bay NAS with two 2TB hard drives in a RAID 1 configuration. I was planning to upgrade it with 2 additional 4TB drives to a RAID 10 configuration. Now the new capacity I will receive with the additional 2 drives is 4TB and not 6TB. How…
akirk
  • 338
  • 4
  • 9
0
votes
1 answer

How to proceed to switch raid 1 disk from secondary to primary?

I have a Dell PowerEdge T100 server with Windows Server 2008 and raid1 configuration. I've just replaced the secondary disk by a new one. (it was pred fail = yes) Now, the raid1 status is ok and the disks are synchronized. Now, I want to turn this…
user1421676
  • 45
  • 2
  • 7
0
votes
2 answers

Dell RAID1 Pred Fail Yes

I have a server with RAID 1 configured that was running too slow.. some applications does not even run. I entered SAS Config. Utility and I checked that RAID 1 was in status 'not synced', but I was able to sync it. Today, both disks have already the…
user1421676
  • 45
  • 2
  • 7
0
votes
1 answer

Files missing after RAID1 restore

I have encountered unpleasant situation. Given mdadm RAID1 of 2 HDD on server. Yesterday one of HDDs completely dies, other shows bad SMART status but was in accessible state. Mdadm showed "clean, degraded". I've replaced completely failed disk and…
Denis
  • 101
  • 1
0
votes
0 answers

Setting up software RAID 1 on System Partition

I have a Windows 2012 R2 Essentials box I'm building (should be the same concerns as a Server 2012 or Server 2012 R2 box). I'm attempting to mirror the system disk (identical 750GB SATA drives) but I can never get a successful mirrored volume…
Jaxidian
  • 283
  • 3
  • 5
  • 19
0
votes
1 answer

Recovering LVM RAID-1 on different computer with only one drive?

I have a drive out of an old LVM RAID-1 that's been sitting for a while. I think the array contained a bunch of my photos from years ago (archived online) but I'd like to get at the original data and copy it to my new NAS. This RAID has never been…
Luciano
  • 131
  • 1
  • 1
  • 4
0
votes
1 answer

debian stable raid autogrow filesystem database

I need to setup a debian stable system meeting the following needs: Hard disks should be mirroring : Raid 1 Filesystem(s) should autogrow if possible (just in case we replace one hdd with a bigger one, wait until sync and replace the other with a…
Bastian Ebeling
  • 103
  • 3
0
votes
1 answer

rsync, dd and then add to RAID 1, could cause database corrupted?

Firstly I have a HDD which has been setup as RAID, type Volume, not RAID 0 or RAID 1 ... and I wanna add one more HDD to setup a RAID 1 array. These bellow steps are what I've done. Detach from Server and dd whole disk from the old HDD to the new…
xuansamdinh
  • 113
  • 1
  • 6
0
votes
2 answers

System does not boot from root LVM RAID1 partition when any of the underlying PV is missing

I have LVM RAID 1 (not mdadm RAID 1, but exactly LVM2 RAID 1) for my root partition. I would like to make my system boot without either of the HDDs where the underlying PVs of the root LVM partition reside. The kernel launch line in grub.cfg…
vprisivko
  • 43
  • 1
  • 6
0
votes
2 answers

Clonezilla is not able to clone a RAID 1 disk

I have a HP Server DL320 G5. There are two SATA hard disks configured as RAID 1 through HP embedded RAID controller. Server OS is running GNU/Linux (Fedora) Server booted up with clonezilla live CD. The image will be stored on a NAS connected…
Adrian
  • 45
  • 1
  • 2
  • 6
0
votes
2 answers

Move CentOS to new raid1 hardware server

I have an existed CentOS server with a normal hard disks (2 disks sda,sdb). They very small. Now I want to update server with a RAID1 hardware and new 2 bigger disks (remove 2 old disk). How can I do it? I have 2 idea: Backup all data and…
monkey
  • 3
  • 1
0
votes
0 answers

Half of disk space missing on RAID1, all disks it seems to be ok

Hi there. I have a problem with raid array. I miss it a half. My disks layout is 2 x 250 gigabytes velociraptors (Array_0000) 2 x 1TB velociraptors (Array_0001) ....both connected in RAID1. OS is Windows Server 2012. Array_0001 is formated in…
ms_devel
  • 133
  • 1
  • 8
0
votes
1 answer

Saving data on a failing software RAID 1 setup

My CentOS 6 server is running a software RAID 1 configuration with two 1 TB disks. Yesterday trouble started happening when the server was very irresponsive. I checked the logs and noticed a whole bunch of continuous error messages having to do with…
Ruben
  • 103
  • 4
0
votes
1 answer

RAID1 - Possible to recover failed drives?

PowerEdge 1850 has two physical hard drives, configured as RAID1. Accessing via DRAC 4/I I can see that both drives indicate Failed & Offline. However, the DRAC log indicates that both drives "de-asserted" from a failed state: Severity Date/Time …
Mark Maslar
  • 103
  • 4
1 2 3
…
33 34