Re: question about paritions/disklabel

["Waitman Gobble" <uzimac%da3m0n8t3r.com@localhost>]

Martin Husemann <martin%duskware.de@localhost> wrote ..
> On Mon, Feb 18, 2013 at 08:38:22AM +0100, Luca Ferrari wrote:
> > 16 partitions:
> 
> This is the maximum number of partitions that this disklabel could have.
> The number varies between arches (and NetBSD versions).
> 
> > #        size    offset     fstype [fsize bsize cpg/sgs]
> >  a:   4192256      2048     4.2BSD   2048 16384     0  # (Cyl.      2*-   
> > 4161*)
> >  c:   4192256      2048     unused      0     0        # (Cyl.      2*-   
> > 4161*)
> >  d:   4194304         0     unused      0     0        # (Cyl.      0 -   
> > 4161*)
> 
> And this is the list of all partitions that are not marked "unused".
> 
> 
> Martin

Thank you,

I'm curious about why I'm receiving this error with dkctl

# dkctl wd1 getcache
dkctl: /dev/rwd1: getcache: Inappropriate ioctl for device


if i make a little test program 'testio':

dvname = argv[1];
fd = opendisk(dvname, O_RDONLY, dvname_store, sizeof(dvname_store), 0);
if (ioctl(fd, DIOCGCACHE, &bits) == -1)
   err(1, "%s: getcache", dvname);
printf("%s: OK\n",dvname);
(void)close(fd);


# ./testio /dev/wd0
/dev/wd0: OK
# ./testio /dev/wd1
testio: /dev/wd1: getcache: Inappropriate ioctl for device
# ./testio /dev/wd2 
testio: /dev/wd2: getcache: Bad file descriptor

(ie, no wd2 on this system so message expected)



/usr/include/errno.h:
#define ENOTTY          25              /* Inappropriate ioctl for device */

I'm trying to figure out what would cause a ENOTTY on /dev/wd1

# ./testio /dev/rwd1e
/dev/rwd1e: OK


# /sbin/dkctl /dev/rwd1e 
strategy:
/dev/rwd1e: priocscan

cache:
/dev/rwd1e: read cache enabled
/dev/rwd1e: write-back cache enabled
/dev/rwd1e: read cache enable is not changeable
/dev/rwd1e: write cache enable is changeable
/dev/rwd1e: cache parameters are not savable

wedges:
/dev/rwd1e: no wedges configured

Maybe I'm over-analyzing it,  and there's no issue! 


Thank you,

-- 
Waitman Gobble
San Jose California USA