[Xen-users] Virtual disk on physical partition of second drive

["John R. Shannon" <john@xxxxxxxxxxxxxxxx>]

NetBSD 3.99.12 domain0 and domainUs:

After creating several domainU's on my first drive, sd0, I'm trying to create 
domains on a second drive, sd1, and encountering surprises.

sd1 is partitioned:

domain0# disklabel sd1
# /dev/rsd1d:
type: SCSI
disk: mydisk
label: fictitious
flags:
bytes/sector: 512
sectors/track: 705
tracks/cylinder: 4
sectors/cylinder: 2820
cylinders: 50824
total sectors: 143374744
rpm: 15015
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0

8 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
  c: 143374681        63     unused      0     0        # (Cyl.      0*- 
  50842*)
  d: 143374744         0     unused      0     0        # (Cyl.      0 - 
  50842*)
  e:  35830920        63     4.2BSD   2048 16384 28760  # (Cyl.      0*- 
  12706*)
  f:  35830920  35830983     4.2BSD   2048 16384 28760  # (Cyl.  12706*- 
  25412*)
  g:  35830920  71661903     4.2BSD   2048 16384 28760  # (Cyl.  25412*- 
  38118*)
  h:  35830920 107492823     4.2BSD   2048 16384 28760  # (Cyl.  38118*- 
  50824*)

I'm trying to install domain "proxy". In it's config file I have:

disk = [ 'phy:/dev/sd1e,sd0d,w' ]
root = "/dev/sd0d"

I am unable to partition xb0. Looking into it, it appears that xb0 is sd1 
rather than sd1e:

# disklabel xbd0
# /dev/rxbd0d:
type: SCSI
disk: mydisk
label: fictitious
flags:
bytes/sector: 512
sectors/track: 705
tracks/cylinder: 4
sectors/cylinder: 2820
cylinders: 50824
total sectors: 143374744
rpm: 15015
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0

8 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
  c: 143374681        63     unused      0     0        # (Cyl.      0*- 
  50842*)
  d: 143374744         0     unused      0     0        # (Cyl.      0 - 
  50842*)
  e:  35830920        63     4.2BSD   2048 16384 28760  # (Cyl.      0*- 
  12706*)
  f:  35830920  35830983     4.2BSD   2048 16384 28760  # (Cyl.  12706*- 
  25412*)
  g:  35830920  71661903     4.2BSD   2048 16384 28760  # (Cyl.  25412*- 
  38118*)
  h:  35830920 107492823     4.2BSD   2048 16384 28760  # (Cyl.  38118*- 
  50824*)

Displaying the disklabel for another domain that uses:

disk = [ 'phy:/dev/sd0h,sd0d,w' ]
root = "/dev/sd0d"

shows that the virtual block device is using the partition:

imap# disklabel xbd0
# /dev/rxbd0d:
type: unknown
disk: Xen Virtual ESD
label:
flags:
bytes/sector: 512
sectors/track: 2048
tracks/cylinder: 1
sectors/cylinder: 2048
cylinders: 14055
total sectors: 28786560
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0

16 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a:    262144         0     4.2BSD   1024  8192 32768  # (Cyl.      0 -    
127)
 b:   4194304    262144       swap                     # (Cyl.    128 -   
2175)
 c:  28786560         0     unused      0     0        # (Cyl.      0 -  
14055*)
 d:  28786560         0     unused      0     0        # (Cyl.      0 -  
14055*)
 e:  12582912   4456448     4.2BSD   2048 16384 26992  # (Cyl.   2176 -   
8319)
 f:   4194304  17039360     4.2BSD   2048 16384 21848  # (Cyl.   8320 -  
10367)
 g:   7552896  21233664     4.2BSD   2048 16384 28880  # (Cyl.  10368 -  
14055*)


Why the difference between sd0 and sd1? What am I missing?

-- 
John R. Shannon
john@xxxxxxxxxxxxxxxx
john.r.shannon@xxxxxxxx
john.r.shannon@xxxxxxxxxxx
shannonjr@xxxxxxxxxx

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