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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.

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Lost RAID 1 on 3ware controller. Good drive booted up with old data

Server is running Windows 2008R2. Drive failed and reported degraded, but restarted and OS loaded. The good drive is a copy from 5/2021 almost 8 months ago. Is it possible the drive stopped copying data on 5/21? The failed drive could it still…
Joe Rocksford
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I would like to understand RAID 1 restore

So, I have a situation here and I'd like to hear some tips about it. I have a Windows Server 2012 R2 and I'm going to upgrade it to Windows 2019. The server has two HDD's in RAID 1. To be on the safe side and have a quick solution in case of a…
cicerosf
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Recovering data from a single-disk raid1 array

I had an idea of a Raspberry Pi file server using multiple external disk drives in a RAID array. For starters I only had a single 1TB disk so I setup a raid1 array on that disk with the intent on adding additional drives later. In the end this…
Darwin
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replacing failed hard disk in raid 1 on dell emc cx300

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 a new hard disk and then it automatically…
user201797
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RAID 10 vs RAID 1 SSDs

I'm considering moving a large database from mechanical disks to SSDs. My initial instinct was to go for RAID 10, but further research suggests that this configuration can significantly reduce the random access performance of the SSDs. The database…
Sufo
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Multiple RAIDS on same disks

On a server, I have 3 SATA disks. I'd like to create a root partition in RAID 1 of 50GB and a data partition in RAID 5 with the remaining spaces on my disks. There would be 2 different RAID types on the same disks. Would it be an issue if one of the…
chindit
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Huge data loss in RAID 1 array

I've recently faced a huge data loss (everything from last 5 months) after one of my disk crashed, even if the RAID array is still fine. This disk was a SSD with my root partition (ext4), mirrored in a mdadm RAID 1 with a fake hardware raid RAID 1…
Olivier
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Can you recover files from an overwritten RAID 1?

Edit: The array is actually RAID1, slight communication hiccup with the rest of my team. Following the decommissioning of one of our server, a manager just realised there was, after all, data that he needed from that server. Now due to proper…
Pixy
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does raid 1 backup also backup mysql updates?

I have a mirrored RAID 1 server. This server has mysql databases. If I run a query to update a mysql database, does this update also get updated on a RAID 1 mirrored setup or do I need a different way to backup mysql data?
jon
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How to reliably and conveniently mirror 2 drives in hotswap hdd racks (likely without RAID1)?

I have the following situation: Need to store 1 original + 1 copy for data sets that are 1-2 TB in size Need to use consumer SATA drives, 1 for original, 1 for copy Need to store 50+ such data sets Data sets are ~rarely accessed / changed so drives…
bogdan
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raid 1 always degraded after pushing reset

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 or software raid 1 such that it is not degraded…
Vyacheslav
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Possible to build a RAID 1 with only one drive with LSI 9260-4i?

I have a LSI 9260-4i RAID card plus 1x 300GB Drive. My issue is I have to ship out the server for the 2nd drive to be installed onsite. Can I configure a RAID 1 with only 1 drive, and plug in the 2nd 300GB drive at a later date? I can not figure…
Damainman
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