Disk Druid and RAID 10 Partitions

[Reindl Harald]

Am 02.03.2012 23:20, schrieb Aero Maxx:
> Hello Reindl,
> 
> Thanks very much for replying to my question, what if I wanted swap to
> be a partition tho, would I create a 4GB partition on each of the 4
> drives or make it 2GB partition on each of the 4 drives?

no idea, since i wanted the setup as easy to maintain as possible
in the case of a drive failure i decided only to split boot, system
and data and all other stuff i do not want on the system disk
is on /mnt/data with bind-mounts

my machines have 16 GB RAM, swap is not really a topic there

> What about using LVM with raid 10?

also no idea, that is why i took 2x4 TB disks
enough free space for the next 10 years
of the 1.6 TB used are 500 GB local backups
and the rest contains a bundle of virtual machines
including a backup-vm for nearly all data i maintain

so no, i do not think about expand the array :-)
/dev/md2      ext4    3,7T  1,6T  2,1T  44% /mnt/data

> On 2 Mar 2012, at 21:48, Reindl Harald <h.reindl at thelounge.net> wrote:
> 
>>
>>
>> Am 02.03.2012 22:39, schrieb Reindl Harald:
>>> Am 02.03.2012 22:32, schrieb Aero Maxx:
>>>> If I am using a raid 10 setup on 4 Hard Drives, would I make a raid partition of 250MB on each of the 4 drives as
>>>> in total this would be 500MB, or would I still make a 500MB raid partition, same for swap still make a 4992MB
>>>> partition or halve it and spread it over the 4 drives?
>>>
>>> 1 x RAID 1 for /boot over all 4 drives
>>> grub-install /dev/sda-/sdv/sdd to have all bootbale
>>>
>>> 1 x RAID10 for the OS
>>> 1 x RAID10 for data
>>>
>>> SWAP can these days be a file
>>> /home is here a folder on /mnt/data with a bind-mount
>>>
>>> this setup runs on 2 identical machines once installed and
>>> with dd over ssh cloned since june 2011, originally F15 and
>>> in the meantime updated to F15
>>> _______________________
>>>
>>> /dev/md0      ext4    497M   66M  427M  14% /boot
>>> /dev/md1      ext4     30G  7,3G   22G  25% /
>>> /dev/md2      ext4    3,7T  1,6T  2,1T  44% /mnt/data
>>>
>>> [root at srv-rhsoft:~]$ cat /proc/mdstat
>>> Personalities : [raid1] [raid10]
>>> md2 : active raid10 sdc3[0] sdd3[3] sda3[4] sdb3[5]
>>>      3875222528 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU]
>>>      bitmap: 1/29 pages [4KB], 65536KB chunk
>>>
>>> md1 : active raid10 sdc2[0] sdd2[3] sda2[4] sdb2[5]
>>>      30716928 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU]
>>>      bitmap: 1/1 pages [4KB], 65536KB chunk
>>>
>>> md0 : active raid1 sdc1[0] sdd1[3] sda1[4] sdb1[5]
>>>      511988 blocks super 1.0 [4/4] [UUUU]
>>
>> forgot the fdisk output
>>
>> /dev/sda1   *        2048     1026047      512000   fd  Linux raid autodetect
>> /dev/sda2         1026048    31746047    15360000   fd  Linux raid autodetect
>> /dev/sda3        31746048  3906971647  1937612800   fd  Linux raid autodetect
>>
>> /dev/sdb1   *        2048     1026047      512000   fd  Linux raid autodetect
>> /dev/sdb2         1026048    31746047    15360000   fd  Linux raid autodetect
>> /dev/sdb3        31746048  3906971647  1937612800   fd  Linux raid autodetect
>>
>> /dev/sdc1   *        2048     1026047      512000   fd  Linux raid autodetect
>> /dev/sdc2         1026048    31746047    15360000   fd  Linux raid autodetect
>> /dev/sdc3        31746048  3906971647  1937612800   fd  Linux raid autodetect
>>
>> /dev/sdd1   *        2048     1026047      512000   fd  Linux raid autodetect
>> /dev/sdd2         1026048    31746047    15360000   fd  Linux raid autodetect
>> /dev/sdd3        31746048  3906971647  1937612800   fd  Linux raid autodetect
>>
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-- 

Mit besten Grüßen, Reindl Harald
the lounge interactive design GmbH
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