Re: Is there something that could change blocksize on iSeries?

I wonder, as well - I just did a quick google on "v9000 block size" - one hit talked about block size on IBM i disk units is 520 bytes, while V9000 they are 512 bytes.

Then there is something it called allocation size - we talk about memory on IBM i being in blocks of 4096 bytes.

There is also something I don't remember the name, but the amount that is read from disk - this is up to 128K, IIRC, on IBM i, and this is used to reduce I/O by reading the largest "segment" one can.

All in all, that was a lot of words giving no direct answer!! Maybe it'll trigger some memories.

Vern

On 10/11/2019 3:03 PM, Roberto José Etcheverry Romero wrote:

What do they call block size? You have your pools, your volumes, they use
extents, etc etc etc, but block size? sounds weird to me... specially in
such non-binary numbers...

On Fri, Oct 11, 2019 at 12:17 PM Steve McKay <samckay1@xxxxxxxxx> wrote:

V7R3 system

IBM Storage Support says that the blocksize on our V9000 was changed from
60K to 90K. They further say that something on the iSeries changed the
blocksize and there is nothing on the V9K that could change the blocksize.

Is there anything on the iSeries that can change blocksize?

Thanks,

Steve McKay
(205) 585-8424
samckay1@xxxxxxxxx
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