topic Re: Disk space in HP-UX Servers in Operating System - HP-UX

Disk space in HP-UX Servers

gab_in — Mon, 09 Jul 2007 04:36:36 GMT

we are planning to buy two servers (rx6600 & rx3600) which will have 146*8 GB SAS drive each. I would like to know whether we can use the entire disk apace 146*8=1168GB for the data ...

If we want mirroring then how much space we can use for the same?

Re: Disk space in HP-UX Servers

SSCHAER — Mon, 09 Jul 2007 05:42:21 GMT

i'd strongly suggest to have at least the root disk mirrored.

these 146gb are the pre-formatted capacity. after initializing the drive you will probably have 140gigs available. therefore doing a full mirror of all disks will give you roughly 560gigs.

somewhere out there someone will be able to provide the exact numbers. but the above should give you a hint.

Re: Disk space in HP-UX Servers

Ninad_1 — Mon, 09 Jul 2007 05:49:12 GMT

You wont get the 146 GB as usable. You will get somewhere around 136 GB for use.
Then again depending on if you plan to have any raid, it will depend on that further.

Regards,
Ninad

Re: Disk space in HP-UX Servers

John Waller — Mon, 09 Jul 2007 06:04:18 GMT

Hi

A 146Gb disk gives 4346 * 32Mb extents. (139,072Mb or 135.8Gb).

As already mentioned I would recommend using 2 disks (1 mirrored to 1 ) for vg00 (root file system). The usage of the remaining 6 depends on whether you need capacity or resilience. If your application uses cross machine journalling or data replication you perhaps could take the risk and not mirror your data and rely on the second box to recover from in case of a failure. Personally I always go for protection and use mirroring and sacrifice capacity.