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2015 Feb 18
5
CentOS 7: software RAID 5 array with 4 disks and no spares?
Hi,
I just replaced Slackware64 14.1 running on my office's HP Proliant
Microserver with a fresh installation of CentOS 7.
The server has 4 x 250 GB disks.
Every disk is configured like this :
* 200 MB /dev/sdX1 for /boot
* 4 GB /dev/sdX2 for swap
* 248 GB /dev/sdX3 for /
There are supposed to be no spare devices.
/boot and swap are all supposed to be assembled in RAID level 1 across 4
disks.
The / partition is supposed to be assembled in RAID level 5 across 4 disks.
With Slackware I created the arrays manually like this:
# mdadm --create /dev/md1 --l...
2015 Feb 18
0
CentOS 7: software RAID 5 array with 4 disks and no spares?
...h 4 disks and no spares?
Hi,
I just replaced Slackware64 14.1 running on my office's HP Proliant
Microserver with a fresh installation of CentOS 7.
The server has 4 x 250 GB disks.
Every disk is configured like this :
* 200 MB /dev/sdX1 for /boot
* 4 GB /dev/sdX2 for swap
* 248 GB /dev/sdX3 for /
There are supposed to be no spare devices.
/boot and swap are all supposed to be assembled in RAID level 1 across 4
disks.
The / partition is supposed to be assembled in RAID level 5 across 4 disks.
With Slackware I created the arrays manually like this:
# mdadm --create /dev/md1 --l...
2015 Feb 18
3
CentOS 7: software RAID 5 array with 4 disks and no spares?
Le 18/02/2015 09:24, Michael Volz a ?crit :
> Hi Niki,
>
> md127 apparently only uses 81.95GB per disk. Maybe one of the partitions has the wrong size. What's the output of lsblk?
[root at nestor:~] # lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 232,9G 0 disk
??sda1 8:1 0 3,9G 0 part
? ??md126 9:126 0 3,9G 0 raid1 [SWAP]
??sda2 8:2