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scsi-disk: guess geometry 

Old operating systems rely on correct geometry to convert from CHS
addresses to LBA.  Providing correct data is necessary for them to boot.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-11-15 16:57:50 +01:00 committed by Kevin Wolf
parent 7082826eb4
commit 245d004947
1 changed files with 2 additions and 2 deletions
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4
hw/scsi-disk.c
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@ -797,7 +797,7 @@ static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf,
break;
}
/* if a geometry hint is available, use it */
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs);
bdrv_guess_geometry(bdrv, &cylinders, &heads, &secs);
p[2] = (cylinders >> 16) & 0xff;
p[3] = (cylinders >> 8) & 0xff;
p[4] = cylinders & 0xff;
@ -831,7 +831,7 @@ static int mode_sense_page(SCSIDiskState *s, int page, uint8_t **p_outbuf,
p[2] = 5000 >> 8;
p[3] = 5000 & 0xff;
/* if a geometry hint is available, use it */
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs);
bdrv_guess_geometry(bdrv, &cylinders, &heads, &secs);
p[4] = heads & 0xff;
p[5] = secs & 0xff;
p[6] = s->qdev.blocksize >> 8;