Re: Raid1: sdb has a lot mor work then sda

[Roberto Spadim <roberto@xxxxxxxxxxxxx>]

it´s a read, a write, or both operation?
about load i think it´s a very big read (sdb) with a very low write (sda)
the disk balance on raid1 is based on nearest (current position - next
read position) disk
on a sequencial read only one disk is better used

i checked that raid1 'have this problem' but it´s a hardware limit, i
didn´t found a solution yet , maybe others friends can found
i made some read balance method some time ago, and the results is
constant 1% of performace improvement on mixed read/write scenario,
but i didn´t saw it as a good performace improvement since it must
have many parameters to configure (time of disk seeks), and the load
isn´t proportional, sometimes a disk use is very bigger than the other
disk

saw raid1 as a parallel/secure work, not as a performace tweak

--
Roberto Spadim
Spadim Technology / SPAEmpresarial
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