Questions tagged [raid-5]

A type of RAID redundancy that includes parity data spread across a number of member disks

31
votes
5answers
50k views

How does parity work on a RAID-5 array?

I'm looking to build a nice little RAID array for dedicated backups. I'd like to have about 2-4TB of space available, as I have this nasty little habit of digitizing everything. Thus, I need a lot of ...
27
votes
2answers
81k views

Can I set up a RAID 5 with a bunch of drives of different sizes?

I currently have 3 1TB drives, a couple 500GB ones and some 750GB ones. Can I put them all in a RAID 5 configuration or do they need to be of same size?
5
votes
3answers
2k views

RAID5 / RAIDZ - is it possible to enlarge without losing data?

If I have a RAID5 with 4x1TB drives, and then in, say, a year I decide to upgrade to 4x2TB, can I swap out one drive at a time, then let the parity rebuild, even if it's mixed-size drives? Obviously ...
1
vote
1answer
13k views

How do I tell mdadm to start using a missing disk in my RAID5 array again?

I have a 3-disk RAID array running in my Ubuntu server. This has been running flawlessly for over a year but I was recently forced to strip, move and rebuild the machine. When I had it all back ...
1
vote
2answers
142 views

How picky are RAID controllers when replacing a drive?

I had a drive fail in a RAID5 array and I'm working on finding a replacement. It's an older drive that's fairly hard to find, and most of them out there are used. How close of a drive do I need to the ...
2
votes
1answer
4k views

Degraded RAID5 and no md superblock on one of remaining drive

This is actually on a QNAP TS-509 NAS. The RAID is basically a Linux RAID. The NAS was configured with RAID 5 with 5 drives (/md0 with /dev/sd[abcde]3). At some point, /dev/sde failed and drive was ...
15
votes
10answers
9k views

Looking for an actual experience of RAID 5 2 drive failure? [closed]

I'm wondering if anyone has any personal experience of RAID 5 2 drive failure with large drives? As I understand it, the theory is that with large 1-2TB drives, if one drive fails in the raid set, it ...
2
votes
1answer
655 views

Software RAID 5 with Multiple Partitions (one encrypted partition)

Can I have multiple partitions using Software RAID 5 on an Ubuntu Server? For example, say using a 4 drive RAID 5 setup, I want one massive partition for storage and a second smaller but encrypted ...
1
vote
2answers
784 views

Setting up an 8 drive raid for home use - hardware configuration?

I wish to build an 8x1.5tb file server for home use. I was looking at putting these 8 HDDs into RAID 5 or 6. However most botherboards only come with 6 sata ports so I will obviously need to get an ...
1
vote
1answer
285 views

Setting up a RAID 5 Array

I am currently trying to convert my drives from just a bunch of external disks, each one individually shared from my (CentOS) server into a RAID array (ideally, RAID 5). At current, my drives are: 2....
0
votes
1answer
12k views

How to setup RAID 5 in Windows 7

How do I setup RAID 5 for Windows 7? I tried it before without success. Is there third -party software or something that's required? When I try to click on RAID 5:
0
votes
1answer
44 views

RAID 5/10 setup

I am trying to setup a personal media server. I am thinking of working with RAID 5 or 10 ( I haven't decided yet). So my questions are What would be a recommended RAID setup? I don't need anything ...