Openmoko Bug #2057: 1bit errors in files

[Openmoko Public Trac]

#2057: 1bit errors in files
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    Reporter:  Richard.Kralovic              |        Owner:  openmoko-devel
        Type:  defect                        |       Status:  new           
    Priority:  normal                        |    Milestone:                
   Component:  unknown                       |      Version:                
    Severity:  normal                        |   Resolution:                
    Keywords:  file corruption, 1bit errors  |    Blockedby:                
Reproducible:  rarely                        |     Blocking:                
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Comment(by Richard.Kralovic):

 Thanks. I still had problems running mtest on full 34000000 38000000
 range, but 34100000 37e00000 works fine. After few hours, mtest found the
 bad bits, too:

 GTA02v6 # mtest 34100000 37e00000 55555555
 Pattern 555555DD  Writing...  Reading...
 Mem error @ 0x351000C0: found 55B5560D, expected 5595560D
 Mem error @ 0x351198C0: found 55B5BC0D, expected 5595BC0D
 Mem error @ 0x351278C0: found 55B5F40D, expected 5595F40D
 Mem error @ 0x351360C0: found 55B62E0D, expected 55962E0D
 Mem error @ 0x351398C0: found 55B63C0D, expected 55963C0D
 Mem error @ 0x351440C0: found 55B6660D, expected 5596660D
 Mem error @ 0x3515C0C0: found 55B6C60D, expected 5596C60D
 Mem error @ 0x3515D8C0: found 55B6CC0D, expected 5596CC0D
 Mem error @ 0x351620C0: found 55B6DE0D, expected 5596DE0D
 Mem error @ 0x3516D8C0: found 55B70C0D, expected 55970C0D
 Mem error @ 0x351758C0: found 55B72C0D, expected 55972C0D
 Mem error @ 0x3517D8C0: found 55B74C0D, expected 55974C0D
 Mem error @ 0x3517E0C0: found 55B74E0D, expected 55974E0D
 Mem error @ 0x351CF8C0: found 55B8940D, expected 5598940D
 Mem error @ 0x351E40C0: found 55B8E60D, expected 5598E60D
 Mem error @ 0x351EC0C0: found 55B9060D, expected 5599060D
 Mem error @ 0x351ED8C0: found 55B90C0D, expected 55990C0D
 Mem error @ 0x351F00C0: found 55B9160D, expected 5599160D

 So it definitely is bad sdram.

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Ticket URL: <https://docs.openmoko.org/trac/ticket/2057#comment:6>
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