A500 machine hard disk

[Fauziah Mahdan]

Hi all I need to add new hd to my A500 server and quo received is 146GB hot plug ultra320 SCSI hard disk.
My stupid question I alway heard of 10,40, few hundres hard disk size and never 146. How it divide the size with swap space, memory swap and is it the real total space is 146.
Ho many can I get when I add on the hard disk to the existing server. Means how is the calculation?

Thanks
Fauziah Mahdan

P.S. This thread has been moved from  Disk to HP-UX > LVM and VxVM. -HP Forum Moderator

[Luk Vandenbussche]

Hi,

Is this a HP9000 model A500?

[Michael Steele_2]

With a 146 GB you have a problem of being forced to combine you O/S volume group with you data volume groups unless you've got more disk on a disk array. Usually vg00 is kept on its own disk. And HP-UX doesnt' need more than 10GB. Here's a typical sizing of vg00 file systems and logical volumes:

http://docs.hp.com/en/5991-2805/ch02s02.html#d0e1432

Note: These first three must be contiguous. Once installed they can't be extended accept through ignite restoration.

lvol1 - /
lvol2 - swap
lvol3 - /stand

If you refer to this link from HP for your sizing plans you're not going to see anything bigger then 11 GB, leaving you with 135 GB of unused data.

Regarding swap: The old formula of 2 or 2.5 times RAM size got thrown out the door when RAM got a lot cheaper and bigger. I think an A500 can carry as much as 16 GB of DIMM (ram) so just ignore this old formula. Base your swap calculation on one times the size of RAM. ie, 2GB to start.

[Fauziah Mahdan]

Luk,
Yes thisis HP 9000 A 500 machine.
Installed with oracle 8i db and no raw disk setup.

[sajeer_2]

Add this disk as new volume group.
Since you have swap on first disk,you dont need to make a swap space on this.
simply create volumes and use it.

You can get usable space of 137GB after adding 146GB disk to LVM.

sajeer

[Fauziah Mahdan]

sajeer,
Where the other 9Gb gone?

[sajeer_2]

Hi Fauziah,
Actually you are not loosing this 9GB.It is just matter of calculation.In otherwords,it is the difference in hardware GB and Software GB
HDD manufacturers call a Gigabyte as 1000Mb.But in software it is 1024Mb.

For more info,see this post
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1050821


sajeer

[Fauziah Mahdan]

Thanks