Re: [Iometer-user] Maximum disk size in sectors

[Ming Z. <mi...@el...>]

On Tue, 2006-11-14 at 11:19 -1000, Ching, Jimen (US SSA) wrote:
> > we discussed about whether use 4KB or 512B for this field for 
> > a while and then think not to send unaligned request is more 
> > important.
> 
> Ok.  I have two followup questions.
> 
> 1.  Does the use of 4KB alignment apply to raw disk tests as well?
> Or just filesystem based tests?

depends on what kind of raw device u use. if a scsi disk, then probably
512b, but if a MD or LVM, then might be 4KB as well.

> 
> 2.  How does this alignment issue affect the 'Start Disk Sector'
> field in the 'Disk Target' tab?  Does it become a block offset?
> And is it also affected by raw disk vs. filesystem tests?

it will be block really.

> 
> I downloaded the PDF documentation from your web site, and there's
> not mention of these Linux issues.  Are there any plans to update
> the documentation?

frankly no. i run out of time and am not a good writer anyway.

i know it is important though. sigh...


> 
> Thanks.
> 
> --jc