dtrace discuss - Jan 2009 - converting

Hello,
I''m using iotime.d from dtrace guide:
io:::start
{
     start[args[0]->b_edev, args[0]->b_blkno] = timestamp;
}

but with 48 disks systems i''d like monitor only 2-3 disks.
I like using in predicate:
/(args[0]->b_edev == "sd6")/
but dtrace write me type mismatch,
Also trying:
((string)args[0]->b_edev == "sd6")/
make me also errors,
How this predicate should be to monitor for only sd6 and sd7 ?

Regards,

-- 
Maciej Browarski

Sun Microsystems Poland Sp. z o.o.
Mobile phone +48 608 847 794
Domaniewska 50a
02-673 Warszawa

Hi Maciej,

Maciej Browarski wrote:
> Hello,
> I''m using iotime.d from dtrace guide:
> io:::start
> {
>      start[args[0]->b_edev, args[0]->b_blkno] = timestamp;
> }
>
> but with 48 disks systems i''d like monitor only 2-3 disks.
> I like using in predicate:
> /(args[0]->b_edev == "sd6")/
> but dtrace write me type mismatch,
> Also trying:
> ((string)args[0]->b_edev == "sd6")/
> make me also errors,
> How this predicate should be to monitor for only sd6 and sd7 ?
>   
The b_edev value is a device number, not a string.  You either need to
get the device number for sd6, or use the devinfo_t argument,

/args[1]->dev_statname == "sd6"/

for the predicate.
max