RAID1 or mirrored RAID uses two disk that have the same data.

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6
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1answer
5k views

Boot from software RAID 1 on Windows Server 2008 R2

I have a Windows Server 2008 R2 x64 system with a single hard drive, and I have a spare hard drive of same size/model that's not being used. I was thinking about dropping in the new drive and setting ...
1
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1answer
206 views

Linux RAID1, with reads restricted to one disk

I'm looking for a way to replicate a all changes on a filesystem between two disks in a master->slave setup. One of the disks is much faster for reads, so I would like to direct all reads to this ...
-2
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1answer
104 views

replacing failed hard disk in raid 1 on dell emc cx300 [closed]

how can I replace failed disk in slot 12 in raid 1 on san dell emc cx300 I HAD Configured the san with hot spare hard disk in slot 13. Is it enough to remove it from it's slot an put instead of it ...
12
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11answers
2k views

Is RAID5 more robust than RAID1

I am about to replace an old hardware RAID5 array with a Linux software RAID1 array. I was talking to a friend and he claimed that RAID5 was more robust than RAID1. His claim was that with RAID5, on ...
2
votes
1answer
3k views

grub2 does not find /boot on RAID1 md0 device

I have RAID1 md0 for /boot consisting of 4 partitions (sda2, sdb2, sdc2, sdd2). I'm using GPT on 2TB HDDs, so first partitions on each disk (sda1, ...) are 1-megabyte bios_grub partitions. I also ...
1
vote
3answers
262 views

Rebuilding Raid-arrays

How I can rebuild raid arrays? I am using Raid 1. My datacentar says it needs to be fixed, first i thought it is HDDs faulty because of smartmoontools scanning result but it is not. command: cat ...
4
votes
3answers
804 views

Write-read errors, Raid1 recovery?

This might sound stupid, but I'm supposed to ask any question here, as long as it is related. So here. I have RAID 1 on the server that is officially soon to be dead. After a chkdsk, the files are ...
3
votes
2answers
210 views

HP DL320e Gen8, 3TB drives, Windows Server 2012 R2 - HDD full capacity alocation difficulties during installation

One interesting task to do but not so easy as i thought. The server is HP DL320e gen8, The main difficulty is with partitioning the RAID1 (2x3TB HDDs) during the installation on 2 partitions (System ...
2
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2answers
1k views

RAID1: How do I “Fail” a drive that's marked as “removed”?

I have (had) a RAID 1 array (2 disk mirror) and one of the disks, sda, failed. So I've replaced the bad disk with a new one, but seem to be stuck on how to get the second drive back up and running as ...
1
vote
2answers
176 views

Remake SW RAID1 from a new HDD and an old HDD with bad blocks

I have a SW RAID1 and I just replaced /dev/sda with a new HDD as the old one failed. Now, upon trying to recreate the RAID array I discovered that the "good" HDD (/dev/sdb) has bad blocks with prevent ...
1
vote
2answers
335 views

SSD redundancy via HDD

Is there a way to guarantee redundancy to an SSD using an HDD? Raid 1 is the best choice to guarantee redundancy in HDDs, but SSDs are too expensive to guarantee redundancy via RAID. If I was to ...
0
votes
2answers
95 views

Replace RAID1 Disc - things to consider

One of my RAID controllers is complaining about a harddrive failure: -- Controller informations -- -- ID | Model c0 | PERC 5/i Adapter -- Arrays informations -- -- ID | Type | Size | Status | ...
0
votes
2answers
421 views

RAID 1 disk is marked as Spare after replacement

one of two disks in my RAID 1 died so I replaced it. When new disk has been added to array the sync process started and few minutes later it has become a Spare. How can I "force" the disk to be a ...
0
votes
1answer
295 views

How to tell a disk failure in RAID1

I have an old Dell poweredge R200 in collocation which has 2 hard disks in RAID 1. I am wondering how should I know if one one the disks is failed?
0
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4answers
1k views

How can I increase the size of a RAID 1 array from 750GB to 1TB? 3ware

3ware 9650SE-2LP Array is 750GB volume, RAID 1. One drive is 750GB, the other is 1TB. Looking to replace the 750GB drive with a 1TB. Will the array rebuild to the max size of 1TB, or will the array ...
-4
votes
1answer
49 views

raid 1 always degraded after pushing reset [closed]

I have Marvell hardware raid 1. After pushing reset or any other incorrect shutdown raid is degraded. Is it possible to create hardware raid 1 on other chips(intel chipset for example) for example ...