boot block in Solaris 1

[smishra]

Hi,
Is it possible to see whether boot block are present in disk or not ? Is there any command which actually read the disk and let me know starting location of boot block ?

Thanks,
smishra

 

[Iago77]

To view bootblocks in a disc:

newfs -N <RAW-device>

For example:

# newfs -N /dev/vx/dsk/rootvol
Warning: 1716 sector(s) in last cylinder unallocated
/dev/vx/rdsk/rootvol: 25067852 sectors in 12241 cylinders of 32 tracks, 64 sectors
12240.2MB in 250 cyl groups (49 c/g, 49.00MB/g, 6144 i/g)
super-block backups (for fsck -F ufs -o b=#) at:
32, 100448, 200864, 301280, 401696, 502112, 602528, 702944, 803360, 903776,
1004192, 1104608, 1205024, 1305440, 1405856, 1506272, 1606688, 1707104,
1807520, 1907936, 2008352, 2108768, 2209184, 2309600, 2410016, 2510432,
2610848, 2711264, 2811680, 2912096, 3012512, 3112928, 3211296, 3311712,
3412128, 3512544, 3612960, 3713376, 3813792, 3914208, 4014624, 4115040,
4215456, 4315872, 4416288, 4516704, 4617120, 4717536, 4817952, 4918368,
5018784, 5119200, 5219616, 5320032, 5420448, 5520864, 5621280, 5721696,
5822112, 5922528, 6022944, 6123360, 6223776, 6324192, 6422560, 6522976,
6623392, 6723808, 6824224, 6924640, 7025056, 7125472, 7225888, 7326304,
7426720, 7527136, 7627552, 7727968, 7828384, 7928800, 8029216, 8129632,
8230048, 8330464, 8430880, 8531296, 8631712, 8732128, 8832544, 8932960,
9033376, 9133792, 9234208, 9334624, 9435040, 9535456, 9633824, 9734240,
9834656, 9935072, 10035488, 10135904, 10236320, 10336736, 10437152, 10537568,
10637984, 10738400, 10838816, 10939232, 11039648, 11140064, 11240480,
11340896, 11441312, 11541728, 11642144, 11742560, 11842976, 11943392,
12043808, 12144224, 12244640, 12345056, 12445472, 12545888, 12646304,
12746720, 12845088, 12945504, 13045920, 13146336, 13246752, 13347168,
13447584, 13548000, 13648416, 13748832, 13849248, 13949664, 14050080,
14150496, 14250912, 14351328, 14451744, 14552160, 14652576, 14752992,
14853408, 14953824, 15054240, 15154656, 15255072, 15355488, 15455904,
15556320, 15656736, 15757152, 15857568, 15957984, 16056352, 16156768,
16257184, 16357600, 16458016, 16558432, 16658848, 16759264, 16859680,
16960096, 17060512, 17160928, 17261344, 17361760, 17462176, 17562592,
17663008, 17763424, 17863840, 17964256, 18064672, 18165088, 18265504,
18365920, 18466336, 18566752, 18667168, 18767584, 18868000, 18968416,
19068832, 19169248, 19267616, 19368032, 19468448, 19568864, 19669280,
19769696, 19870112, 19970528, 20070944, 20171360, 20271776, 20372192,
20472608, 20573024, 20673440, 20773856, 20874272, 20974688, 21075104,
21175520, 21275936, 21376352, 21476768, 21577184, 21677600, 21778016,
21878432, 21978848, 22079264, 22179680, 22280096, 22380512, 22478880,
22579296, 22679712, 22780128, 22880544, 22980960, 23081376, 23181792,
23282208, 23382624, 23483040, 23583456, 23683872, 23784288, 23884704,
23985120, 24085536, 24185952, 24286368, 24386784, 24487200, 24587616,
24688032, 24788448, 24888864, 24989280,

First superblock is always stored on block 32, to find out the rest of them use the shown command.