Disks service time - sar

[Alex Lavrov.]

Hello,
I see in sar report that average service time for my disks (EMC storage), is 30-50 ms

Is it normal and if not what are the normal service times?

Thanx.

[B. Hulst]

Hi,

What type of EMC array and what type of disks?

CX300, cx500 or cx700?
36GB or 73 GB or ???

Regards,
Bob

[Alex Lavrov.]

I'm pretty sure it's 500 and disks are 36GB

[B. Hulst]

Hi,

The disks themselves (36GB) have between 2-4 ms.

You should login to the navisphere GUI and check the performance from there.

The CX500 has a good interface for that purpose.

You can also tuned a bit the ratio of read/write cache.

Regards,
Bob

[Alex Lavrov.]

OK, thank you for your help.