Re: installing bootblocks on a new drive

[Petar Bogdanovic <petar%smokva.net@localhost>]

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