[c-nsp] Data Bus Error exception on a AS5300

[Justin Shore]

I just moved a AS5300 that's been powered up for a few years from one 
rack to another.  I also replaced the AC PSU with a refurbished DC PSU 
(Cisco refurb through distribution).  (On a side note here, has anyone 
else ever noticed how much of a PITA it is to replace a 5300 PSU?  The 
5350 is so much easier)  The 5300 is in an endless loop of crashing.  It 
doesn't always crash at the same spot either.  Usually it crashes within 
a second or two of starting the image decompression.  A couple times it 
has completed that process, displayed the IOS legalease text, spit out a 
log message (like %SYS-3-LOGGER_FLUSHING) and then crashed.


System Bootstrap, Version 12.0(2)XD1, EARLY DEPLOYMENT RELEASE SOFTWARE 
(fc1)
Copyright (c) 1999 by cisco Systems, Inc.
TAC:Home:SW:IOS:Specials for info
AS5300 platform with 131072 Kbytes of main memory

program load complete, entry point: 0x80008000, size: 0x24a18c
Self decompressing the image : #################### [OK]


  Data Bus Error exception, CPU signal 10, PC = 0x601F6420


-Traceback= 601F6420 601F67A4 601F6C7C 601EEF88 601EF168 601EF1E8 
60172FC4 600863B4 600865E4 60149A34 60149A18
$0 : 00000000, AT : 00000048, v0 : 00000001, v1 : 601F64E8
a0 : 00000000, a1 : 3C400080, a2 : 00000048, a3 : 3C400000
t0 : 3C400000, t1 : 34008701, t2 : 34008700, t3 : FFFF00FF
t4 : 0000002F, t5 : 3E800104, t6 : 00000400, t7 : 60746DD8
s0 : 605BDA90, s1 : 00000000, s2 : 605B882C, s3 : 605B8820
s4 : 00400000, s5 : 00000000, s6 : 00000001, s7 : 605C0000
t8 : 6064D48C, t9 : 00000000, k0 : 30408401, k1 : 30410000
gp : 605A24A0, sp : 606591D0, s8 : 00000000, ra : 601F67A4
EPC  : 601F6420, ErrorEPC : BFC00380, SREG     : 34008703
MDLO : 00012C7B, MDHI     : 00000001, BadVaddr : 04552805
Cause 0000001C (Code 0x7): Data Bus Error exception
Free space check for bootflash:crashinfo_20070227-004755 failed (68/1138)
Free space check for flash:crashinfo_20070227-004755 failed (148/1138)


=== Flushing messages (00:47:55 UTC Tue Feb 27 2007) ===

*** System received a Bus Error exception ***
Access address = 0x3c400080
signal= 0xa, code= 0x1c, context= 0x606030d4
PC = 0x60180314, Cause = 0x20, Status Reg = 0x34008002





I can get it to drop me into rommon.  Bootflash: and flash: are both 
full of crashinfo files:


rommon 6 > dir bootflash:
          File size           Checksum   File name
    2400976 bytes (0x24a2d0)   0xd698    c5300-boot-mz.123-10.bin
     159795 bytes (0x27033)    0xaae7    crashinfo_20070227-000251
     179257 bytes (0x2bc39)    0xd41c    crashinfo_20070227-000351
     159795 bytes (0x27033)    0xa1d4    crashinfo_20070227-000413
     179257 bytes (0x2bc39)    0xc443    crashinfo_20070227-000513
     159795 bytes (0x27033)    0xc063    crashinfo_20070227-000534
     179257 bytes (0x2bc39)    0x044c    crashinfo_20070227-000635
     159795 bytes (0x27033)    0xfa46    crashinfo_20070227-000656
     179257 bytes (0x2bc39)    0xba27    crashinfo_20070227-000757
     159795 bytes (0x27033)    0xc94e    crashinfo_20070227-000817
     179257 bytes (0x2bc39)    0x9430    crashinfo_20070227-000918
     159795 bytes (0x27033)    0x34ae    crashinfo_20070227-000939
     179257 bytes (0x2bc39)    0xd0e5    crashinfo_20070227-001040
     159795 bytes (0x27033)    0x2153    crashinfo_20070227-001101
     179257 bytes (0x2bc39)    0x888c    crashinfo_20070227-001202
     159795 bytes (0x27033)    0xb04e    crashinfo_20070227-001222
     179257 bytes (0x2bc39)    0x8b70    crashinfo_20070227-001324
     159795 bytes (0x27033)    0x5be1    crashinfo_20070227-001344
     179257 bytes (0x2bc39)    0xdd74    crashinfo_20070227-001446
     159795 bytes (0x27033)    0xb4ad    crashinfo_20070227-001506
     179257 bytes (0x2bc39)    0x80d5    crashinfo_20070227-001608
     159795 bytes (0x27033)    0x3ab7    crashinfo_20070227-001628
     179257 bytes (0x2bc39)    0xec70    crashinfo_20070227-001730
     159795 bytes (0x27033)    0xcec4    crashinfo_20070227-001752
     179257 bytes (0x2bc39)    0x8c53    crashinfo_20070227-001852
     159795 bytes (0x27033)    0x430a    crashinfo_20070227-001914
     179257 bytes (0x2bc39)    0x358d    crashinfo_20070227-002014
     159795 bytes (0x27033)    0xda67    crashinfo_20070227-002036
     179376 bytes (0x2bcb0)    0x89ee    crashinfo_20070227-002137
     159795 bytes (0x27033)    0x6b1a    crashinfo_20070227-002159
     179257 bytes (0x2bc39)    0x2a5d    crashinfo_20070227-002259
     159795 bytes (0x27033)    0x3dd0    crashinfo_20070227-002321
     179257 bytes (0x2bc39)    0x26ee    crashinfo_20070227-002422
     159795 bytes (0x27033)    0x8bc9    crashinfo_20070227-002444
     179257 bytes (0x2bc39)    0xa152    crashinfo_20070227-002544
     159795 bytes (0x27033)    0x6052    crashinfo_20070227-002606
      56424 bytes (0xdc68)     0x3e14    crashinfo_20070227-002707
       4840 bytes (0x12e8)     0x2bbe    crashinfo_20070227-002729
rommon 7 >
rommon 7 > dir flash:
          File size           Checksum   File name
   15130036 bytes (0xe6ddb4)   0x084a    c5300-jk9s-mz.123-10.bin
     451126 bytes (0x6e236)    0xece9    mica-modem-pw.2.9.5.0.bin
     172274 bytes (0x2a0f2)    0xf3b7    crashinfo_20070227-002829
     159241 bytes (0x26e09)    0x7600    crashinfo_20070227-002851
     172274 bytes (0x2a0f2)    0x81e6    crashinfo_20070227-002952
     159241 bytes (0x26e09)    0x69ef    crashinfo_20070227-003014
     172274 bytes (0x2a0f2)    0x3f87    crashinfo_20070227-003115
     159241 bytes (0x26e09)    0x8303    crashinfo_20070227-003136
     172274 bytes (0x2a0f2)    0x5fa6    crashinfo_20070227-003237
      22728 bytes (0x58c8)     0xbe84    crashinfo_20070227-003259
       5630 bytes (0x15fe)     0x9ec3    crashinfo_20070227-003400


Suggestions?  Am I looking at corrupt images or bad flash?

Thanks
  Justin