Subject: mbrlabel and extended partitions (NetBSD 1.6.1/i386)
To: None <current-users@netbsd.org>
From: Ian Zagorskih <ianzag@megasignal.com>
List: current-users
Date: 06/06/2003 21:27:03
I have a problem when trying to add FAT or NTFS partitions into in-core=20
disklabel when they are located inside extended disk partition.
Disk wd1 is 60Gb IMB <somtehing tralala> which have one big extended part=
ition=20
in MBR and one NTFS5 partition inside extended partition.
--- cut ---
bash-2.05# disklabel wd1
# /dev/rwd1d:
8 partitions:
# size offset fstype [fsize bsize cpg/sgs]
d: 120103200 0 unused 0 0 # (Cyl. 0 - 11=
9149)
e: 115989300 4096575 unused 0 0 # (Cyl. 4064*-=20
119132*)
disklabel: boot block size 0
disklabel: super block size 0
--- cut ---
Now trying to locate MBR partitions on wd1 and add them into disklabel if=
smth=20
found:
--- cut ---
bash-2.05# mbrlabel -w wd1
Found NTFS partition; size 115989237 (56635 MB), offset 4096638
adding NTFS partition to slot a.
8 partitions:
# size offset fstype [fsize bsize cpg/sgs]
a: 115989237 4096638 NTFS # (Cyl. 4064*-=20
119132*)
d: 120103200 0 unused 0 0 # (Cyl. 0 - 11=
9149)
e: 115989300 4096575 unused 0 0 # (Cyl. 4064*-=20
119132*)
Updating in-core disk label.
--- cut ---
Ok, we found one new NTFS partition as we did expect and added it as wd1a=
, at=20
least it is reported so. Now checking wd1 disklabel:
--- cut ---
bash-2.05# disklabel wd1
# /dev/rwd1d:
8 partitions:
# size offset fstype [fsize bsize cpg/sgs]
d: 120103200 0 unused 0 0 # (Cyl. 0 - 11=
9149)
e: 115989300 4096575 unused 0 0 # (Cyl. 4064*-=20
119132*)
disklabel: boot block size 0
disklabel: super block size 0
--- cut ---
=2E..and we can see that there are no wd1a as if mbrlabel didn't find any=
thing=20
:(
What i am doing wrong ?
Note that on the same system i have another [master] NTFS partition on wd=
0 but=20
this partition is declared as MBR partition i.e. not inside extended. And=
=20
above trick with "mbrlabel -w wd0" works excellent - it successfully adds=
it=20
into in-core disklabel for wd0 so next i can mount it:
--- cut ---
bash-2.05# disklabel wd0
# /dev/rwd0d:
16 partitions:
# size offset fstype [fsize bsize cpg/sgs]
a: 1091664 6144768 4.2BSD 1024 8192 87 # (Cyl. 6096 - 71=
78)
b: 1050336 7236432 swap # (Cyl. 7179 - 82=
20)
c: 5120640 6144768 unused 0 0 # (Cyl. 6096 - 11=
175)
d: 39102336 0 unused 0 0 # (Cyl. 0 - 38=
791)
e: 2978640 8286768 4.2BSD 1024 8192 86 # (Cyl. 8221 - 11=
175)
f: 26828550 12273660 NTFS # (Cyl. 12176*-=20
38791*)
g: 6136767 63 unknown # (Cyl. 0*- 60=
88*)
--- cut ---
What's wrong ? It looks like mbrlabel capable to read extended partitions=
=20
table but due to some reasons it cannot add it into in-core disklabel.
// wbr