Topic: Raid 5 with 6x500Gb

[stian]

I am trying to install sme server on a MSI G965MDH (Intel G965) with 6 x 500Gb disks attached to it. Install runs fine but rebooting when finnished install gives kernel panic.

Any idea why? I am not over the 2000Gb limit cause sme server should configure this as RAID5 with a hot spare. That will end up with exactly or a little less than 2000Gb storage. I have set jumpers at all disk to SATA1-mode and set SATA1-configuration in BIOS to ahci.

I tried it with just 4 disks, and then it works smoothly.

Link to mainboard: http://www.hardwarezone.com/articles/view.php?cid=6&id=2218

--
Stian

[imcintyre]

not being sarcastic but couldn't help notice that 500x(6-1)=2,500 Gb

[byte]

I am trying to install sme server on a MSI G965MDH (Intel G965) with 6 x 500Gb disks attached to it. Install runs fine but rebooting when finnished install gives kernel panic.

Could you please report bugs and potential bugs in the bug tracker, thanks!

[stian]

  5x500 = 2500, but not with Raid5

http://www.ibeast.com/content/tools/RaidCalc/RaidCalc.asp

[SoftDux]

so, is there a 2TB disk space limit with SME?

[Reinhold]

http://wiki.contribs.org/KnownProblems

* Anaconda doesn't support >2Tb
Installing on large storage devices will take a significant amount of work. see Bugzilla:1963

http://bugs.contribs.org/show_bug.cgi?id=1963

Regards
Reinhold

[Reinhold]

... and imcintyre 

RAID5  has capacity of:
 no.of.drives  -  1  -  no.of.spares

or in this case:   6 - 1 - 1 = 4 ;  4 * 500Gb = 2 Tb
(at least basically ... iow give/take marketeer-fiddling with sizes
so please stian check the -real- "Gib" capacity of the drives you use)

Regards
Reinhold

[kevinb]

Hi Stian,

You can install SME by typing “sme partition” at the install screen. Then you can edit the default partitions.

You will have to delete the LV’s since the text GUI does not seem to support them and recreate your RAID partitions scratch. Then you can create a RAID 1 100 Mb partition for “/boot”, a RAID 5 xxx partition for “/swap” and a RAID 5 2Tb partition for “/”.

The swap partition should be 4096 minus whatever your system RAM is or whatever you need to get your “/” partition below the 2TB limit.

Alternatively you could split the 2Tb’s into a “/” and another partition (e.g. /opt, /var, or ?).

Hope this helps.

Kevin

[SoftDux]

wouldn't that make upgrades in the future a bit difficult?

[kevinb]

Softdux,

I can't image why it would. When you upgrade it does not repartition and reformat the drives.

Kevin

[Reinhold]

I can't image why it would.

I can ...
...and I really would like SHAD LORDS - the developer of that aspect of SME - to comment before you all start trying.

Regards
Reinhold

[stephen noble]

I can ...
...and I really would like SHAD LORDS - the developer of that aspect of SME - to comment before you all start trying.

Shad is more likely to respond to a bug report that results in an improvement to code or docs

[kevinb]

OK I opened a bug report "http://bugs.contribs.org/show_bug.cgi?id=3823"

Reinhold, what do you anticipate being an issue. I would like to know so I can test it.

I did do an update from 7.2 to 7.3 on a test VM without issue and have since installed this on the production server using affa to move the data over (backup and restore). All is working well but now I have concerns.

I will try and update to 8.0 Beta on the VM machine and report my results.

Kevin