New disk configuration with mirroring.

[Gulam Mohiuddin]

Following new 10 x 18GB Hard disk we have added into our system.

System: V-2500 & HP-UX 11.0 WITH MIRROR-DISK.

0/1/0.8.0 1 Unused -- 17366 SEGATE ST3..
0/1/0.9.0 1 Unused -- 17366 SEGATE ST3..
1/0/0.8.0 1 Unused -- 17366 SEGATE ST3..
1/0/0.9.0 1 Unused -- 17366 SEGATE ST3..
1/1/0.8.0 1 Unused -- 17366 SEGATE ST3..
1/1/0.9.0 1 Unused -- 17366 SEGATE ST3..
2/1/0.8.0 1 Unused -- 17366 SEGATE ST3..
2/1/0.9.0 1 Unused -- 17366 SEGATE ST3..
5/2/0.8.0 1 Unused -- 17366 SEGATE ST3..
5/2/0.9.0 1 Unused -- 17366 SEGATE ST3..

I want to inlude these disk into our existing Systesm so that we can use them to store our Oracle data.

I have few question before I start configuring those disks.

1) Is each disk on separate controller or not, from above list(For Performance).
2) Complete steps/commands/syntax to setup these disk so I can store Oracle data.
3) Half of the disk/space I want to use it for strict mirroring (Protection).
4) 50% about 8.5GB disk space for data and rest of 50% will be use for mirroring.
5) I want to use all controllers for my data disk for better performace.
6) How to create mirror disks.
7) What is the best combination:
a) Five disks for Data and rest of five for mirroring (half controllers for data disk).
b) Each disk devided (LogVol) half 50% for storing the data and remaining half for mirroring but for each disk's mirror copy will be on different disk (all controllers used for data disks).

Thanks,

[Anthony Goonetilleke]

This is a very long question, there are several controllers as shown by the HW path you best bet is to either go on the LVM course or read the Managing Workgroups Doc it is quite good, if you have any specific questions after that then post them to the forums.

[Carlos Fernandez Riera]

Dont forget you must leave datafiles for index and datafiles for data in separate disks. Rollbacks, redologs too. its and ideal configuration for optimal performance.

I supose your box have lots of disks more, so you must take in mind your current configuration.


Use glance to take a look of actual usage of disk, then you can balance I/O.

[Dave Wherry]

One disk per controller? You must have one heck of a budget.
It's sounding a little overcomplicated. Scrap it all and get an XP256. Then you'll see the performance you want.