Re: installing bootblocks on a new drive

To: netbsd-users%netbsd.org@localhost
Subject: Re: installing bootblocks on a new drive
From: Milos Negovanovic <milos.negovanovic%googlemail.com@localhost>
Date: Mon, 23 Feb 2009 15:53:20 +0000

On Mon, Feb 23, 2009 at 03:51:42PM +0100, Petar Bogdanovic wrote:
> On Mon, Feb 23, 2009 at 03:42:58PM +0100, Petar Bogdanovic wrote:
> > On Mon, Feb 23, 2009 at 11:50:21AM +0000, Milos Negovanovic wrote:
> > > 
> > > After replacing a failed drive in RAID1 array I am trying to install
> > > bootblocks on a new disk via:
> > > 
> > > /usr/sbin/installboot -o timeout=5 -v /dev/rwd0a /usr/mdec/bootxx_ffsv2
> > > 
> > > 
> > > When I try to boot of the new drive all I get is a reboot? Any ideas?
> > 
> > Is there any bootcode in the mbr of wd0 (see `fdisk -B' & mbr(8))? If
> > not, does the partition table of wd0 contain an active partition?
> > 
> > As far as I remember, the first 446 bytes of the mbr may be empty, if
> > the mbr partition table contains an active partition and the BIOS is
> > clever enough.
> 
> Some indicators..
> 
>    # fdisk /dev/wd0
>    (...)
>    Partition table:
>    0: NetBSD (sysid 169)
>        start 63, size 781422705 (381554 MB, Cyls 0-51681/95/63), Active
>    (...)                                                         ^^^^^^
> 
>    # dd if=/dev/wd0d bs=1 count=446 2>/dev/null | hexdump -C
>    00000000  31 c0 8e d0 bc 00 7c 8e  c0 8e d8 89 e6 bf 00 06  
> |1.....|.........|
>    00000010  b9 00 01 f3 a5 b9 00 02  f3 ab ea 1f 06 00 00 80  
> |................|
>    00000020  fa 8f 7e 02 b2 80 52 52  be 1f 07 e8 4a 01 bb 94  
> |..~...RR....J...|
>    00000030  07 8d af 2a 00 8a 46 04  84 c0 74 0a 80 7e 00 80  
> |...*..F...t..~..|
>    00000040  75 04 89 2e 84 0b 83 c5  10 83 c3 09 80 fb b8 75  
> |u..............u|
>    00000050  e4 b8 e1 00 c1 e0 02 89  c6 8b b4 00 08 85 f6 75  
> |...............u|
>    00000060  19 b8 2f 07 be 15 07 e8  14 01 89 c6 e8 09 01 5a  
> |../............Z|
>    00000070  31 c0 cd 13 cd 18 fb f4  eb fc 66 8b 6c 08 f6 06  
> |1.........f.l...|
>    00000080  91 07 04 75 43 5a 52 b4  08 cd 13 8b 44 02 50 c0  
> |...uCZR.....D.P.|
>    00000090  e8 06 86 c4 c1 ea 08 42  f7 e2 8a 54 01 01 d0 83  
> |.......B...T....|
>    000000a0  e1 3f f7 e1 5a 83 e2 3f  01 d0 48 39 e8 74 47 bb  
> |.?..Z..?..H9.tG.|
>    000000b0  aa 55 b4 41 5a 52 cd 13  b8 67 07 72 a7 81 fb 55  
> |.U.AZR...g.r...U|
>    000000c0  aa 75 a1 f6 c1 01 74 9c  66 89 2e 0d 07 be 05 07  
> |.u....t.f.......|
>    000000d0  b4 42 5a 52 cd 13 b8 43  07 72 89 a0 00 7c 84 c0  
> |.BZR...C.r...|..|
>    000000e0  74 03 a1 fe 7d 3d 55 aa  b8 53 07 0f 85 75 ff 66  
> |t...}=U..S...u.f|
>    000000f0  89 ee 5a e9 0a 75 5a 8a  74 01 8b 4c 02 bb 00 7c  
> |..Z..uZ.t..L...||
>    00000100  b8 01 02 eb ce 10 00 01  00 00 7c 00 00 00 00 00  
> |..........|.....|
>    00000110  00 00 00 00 00 45 72 72  6f 72 20 00 0d 0a 00 4e  |.....Error 
> ....N|<
>    00000120  65 74 42 53 44 20 4d 42  52 20 62 6f 6f 74 00 4e  |etBSD MBR 
> boot.N|<
>    00000130  6f 20 61 63 74 69 76 65  20 70 61 72 74 69 74 69  |o active 
> partiti|<
>    00000140  6f 6e 00 44 69 73 6b 20  72 65 61 64 20 65 72 72  |on.Disk read 
> err|<
>    00000150  6f 72 00 4e 6f 20 6f 70  65 72 61 74 69 6e 67 20  |or.No 
> operating |<
>    00000160  73 79 73 74 65 6d 00 49  6e 76 61 6c 69 64 20 43  
> |system.Invalid C|<
>    00000170  48 53 20 72 65 61 64 00  e8 03 00 be 1c 07 60 ac  |HS 
> read.......`.|<
>    00000180  b4 0e bb 01 00 cd 10 ac  84 c0 75 f4 61 c3 00 00  
> |..........u.a...|
>    00000190  1c 80 b6 00 00 00 00 00  00 00 00 00 00 00 00 00  
> |................|
>    000001a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  
> |................|
>    000001b0  00 00 00 00 00 00 00 00  00 00 00 00 e1 b5        
> |..............|
>    000001be
> 
> 
> 
>    Petar Bogdanovic
> 
> 
> 

This is what fdisk says:

# fdisk wd0
Disk: /dev/rwd0d
NetBSD disklabel disk geometry:
cylinders: 969021, heads: 16, sectors/track: 63 (1008 sectors/cylinder)
total sectors: 976773168

BIOS disk geometry:
cylinders: 1023, heads: 81, sectors/track: 63 (5103 sectors/cylinder)
total sectors: 976773168

Partition table:
0: NetBSD (sysid 169)
    start 63, size 976773105 (476940 MB, Cyls 0-191411/44/63), Active
1: <UNUSED>
2: <UNUSED>
3: <UNUSED>
Bootselector disabled.
First active partition: 0



And this is first 466 bytes:

# dd if=/dev/wd0d bs=1 count=446 2>/dev/null | hexdump -C
00000000  31 c0 8e d0 bc 00 7c 8e  c0 8e d8 bf 1d 06 be 1d  |1.....|.........|
00000010  7c 50 57 b9 e3 01 f3 a4  b5 03 f3 ab cb 80 fa 8f  ||PW.............|
00000020  7e 02 b2 80 52 52 bb 94  07 8d af 2a 00 8a 46 04  |~...RR.....*..F.|
00000030  84 c0 74 0a 80 7e 00 80  75 04 89 2e 84 0b 83 c5  |..t..~..u.......|
00000040  10 83 c3 09 80 fb b8 75  e4 b8 e1 00 c1 e0 02 89  |.......u........|
00000050  c6 8b b4 00 08 85 f6 75  19 b8 17 07 50 be 0d 07  |.......u....P...|
00000060  e8 03 01 5e e8 f9 00 5a  31 c0 cd 13 cd 18 fb f4  |...^...Z1.......|
00000070  eb fc 66 8b 6c 08 f6 06  91 07 04 75 43 5a 52 b4  |..f.l......uCZR.|
00000080  08 cd 13 8b 44 02 50 c0  e8 06 86 c4 c1 ea 08 42  |....D.P........B|
00000090  f7 e2 8a 54 01 01 d0 83  e1 3f f7 e1 5a 83 e2 3f  |...T.....?..Z..?|
000000a0  01 d0 48 39 e8 74 47 bb  aa 55 b4 41 5a 52 cd 13  |..H9.tG..U.AZR..|
000000b0  b8 4f 07 72 a7 81 fb 55  aa 75 a1 f6 c1 01 74 9c  |.O.r...U.u....t.|
000000c0  66 89 2e 05 07 be fd 06  b4 42 5a 52 cd 13 b8 2b  |f........BZR...+|
000000d0  07 72 89 a0 00 7c 84 c0  74 03 a1 fe 7d 3d 55 aa  |.r...|..t...}=U.|
000000e0  b8 3b 07 0f 85 75 ff 66  89 ee 5a e9 12 75 5a 8a  |.;...u.f..Z..uZ.|
000000f0  74 01 8b 4c 02 bb 00 7c  b8 01 02 eb ce 10 00 01  |t..L...|........|
00000100  00 00 7c 00 00 00 00 00  00 00 00 00 00 45 72 72  |..|..........Err|
00000110  6f 72 20 00 0d 0a 00 4e  6f 20 61 63 74 69 76 65  |or ....No active|
00000120  20 70 61 72 74 69 74 69  6f 6e 00 44 69 73 6b 20  | partition.Disk |
00000130  72 65 61 64 20 65 72 72  6f 72 00 4e 6f 20 6f 70  |read error.No op|
00000140  65 72 61 74 69 6e 67 20  73 79 73 74 65 6d 00 49  |erating system.I|
00000150  6e 76 61 6c 69 64 20 43  48 53 20 72 65 61 64 00  |nvalid CHS read.|
00000160  e8 03 00 be 14 07 60 ac  b4 0e bb 01 00 cd 10 ac  |......`.........|
00000170  84 c0 75 f4 61 c3 00 00  00 00 00 00 00 00 00 00  |..u.a...........|
00000180  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000190  1c 80 b6 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001b0  00 00 00 00 00 00 00 00  00 00 00 00 e1 b5        |..............|
000001be


Regards
-- 
Milos Negovanovic
milos.negovanovic%googlemail.com@localhost

Follow-Ups:
- Re: installing bootblocks on a new drive
  - From: Petar Bogdanovic

References:
- installing bootblocks on a new drive
  - From: Milos Negovanovic
- Re: installing bootblocks on a new drive
  - From: Petar Bogdanovic
- Re: installing bootblocks on a new drive
  - From: Petar Bogdanovic

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