strange system crash.

From: Mukesh Soni <MSONI_at_tuc.com>
Date: Fri, 15 May 1998 10:55:10 -0500

DU4.0B, AS 4100, swxcr RAID 5, Advfs

Trying to delete any file from one particular directory crashes the
system with the crash-data.1 saying ...

ADVFS EXCEPTION
Module = bs_bitfile_sets.c, Line = 1647
bs_frag_alloc: invalid frag
panic (cpu 0): bs_frag_alloc: invalid frag
syncing disks... done

shfragbf on the filesystem gives me .....
 # /sbin/advfs/shfragbf /usr/informix/backup/.tags/1
invalid frag group, pg 2352invalid frag group, pg 2368invalid frag
group, pg 238
4
Type Grps bad Frags free in-use Bytes free in-use
---- ------ ------ ------ ------ ------ ------ ------ ------
  0k 20 0 2540 2540 0 0k 0k 0k
  1k 3 0 381 138 243 381k 138k 243k
  2k 4 0 252 105 147 504k 210k 294k
  3k 2 0 84 5 79 252k 15k 237k
  4k 2 0 62 15 47 248k 60k 188k
  5k 3 0 75 19 56 375k 95k 280k
  6k 2 0 42 11 31 252k 66k 186k
  7k 2 0 36 9 27 252k 63k 189k

Percent Free Frags per Group Histogram
Type Grps 9% 19% 29% 39% 49% 59% 69% 79% 89% 99% 100%
---- ------ --- --- --- --- --- --- --- --- --- --- ---
  0k 20 0 0 0 0 0 0 0 0 0 0 20
  1k 3 1 1 0 0 0 0 0 0 1 0 0
  2k 4 1 1 0 0 0 1 0 0 0 1 0
  3k 2 2 0 0 0 0 0 0 0 0 0 0
  4k 2 0 1 0 1 0 0 0 0 0 0 0
  5k 3 2 0 0 0 0 0 1 0 0 0 0
  6k 2 1 0 0 0 1 0 0 0 0 0 0
  7k 2 0 0 2 0 0 0 0 0 0 0 0

fragbf occupies 5248k bytes
                2001k in-use, 3187k free, 38k overhead, 22k wasted

Also,

 # showfile ps_mc_type.unl

         Id Vol PgSz Pages XtntType Segs SegSz Log Perf File
showfile: lstat failed for file 'ps_mc_type.unl'; I/O error

Any command using lstat() gives the same result.

uerf show me ...
OPERATING SYSTEM DEC OSF/1
OCCURRED/LOGGED ON Fri May 15 09:34:37 1998
OCCURRED ON SYSTEM tuacct1
SYSTEM ID x00070016
SYSTYPE x00000000
PROCESSOR COUNT 2.
PROCESSOR WHO LOGGED x00000000
MESSAGE panic (cpu 0): bs_frag_alloc:
invalid
                                         _frag


I just want to get rid of this directory. Data in it is not important.

Any ideas would be greatly appreciated.


Thanx in Advance

Mukesh
Received on Fri May 15 1998 - 17:59:06 NZST

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