SCSI tape data loss

[Michael L. Squires]

I ran "tapetest.c" under 5.1-RELEASE (without pthread under 5.1-RELEASE,
first part with pthread under 5.1-RELEASE, second part (scan) under
5.1-RELEASE-p2).

216012 blocks written/read without pthreads
217073 blocks written/read with pthreads (same!)

Hardware is SuperMicro P6DGH, dual PIII/850, onboard AIC7896, DLT4000 tape
drive, Seagate ST423451W 23GB HD.

--------------------------results----------------------------------------------

dmesg:

FreeBSD 5.1-RELEASE #1: Sat Aug 23 14:56:45 EST 2003
    root at mikes.siralan.org:/usr/obj/usr/src/sys/MIKES
CPU: Intel Pentium III (851.93-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x686  Stepping = 6

ahc0: <Adaptec aic7896/97 Ultra2 SCSI adapter> port 0xe400-0xe4ff mem 0xffafe000-0xffafefff irq 10 at device 14.0 on pci0
aic7896/97: Ultra2 Wide Channel A, SCSI Id=7, 32/253 SCBs
ahc1: <Adaptec aic7896/97 Ultra2 SCSI adapter> port 0xe800-0xe8ff mem 0xffaff000-0xffafffff irq 10 at device 14.1 on pci0
aic7896/97: Ultra2 Wide Channel B, SCSI Id=7, 32/253 SCBs

sa0 at ahc1 bus 0 target 4 lun 0
sa0: <Quantum DLT4000 CD43> Removable Sequential Access SCSI-2 device 
sa0: 10.000MB/s transfers (10.000MHz, offset 15)

output from tapetest.c (edited)

weof_dev
Wrote EOF to /dev/sa0
Write failed.  Last block written=216012. stat=0 ERR=Unknown error: 0

*rewind
Rewound /dev/sa0
*scan
Starting scan at file 0
216012 blocks of 64512 bytes in file 0
End of File mark.
End of File mark.
End of tape
Total files=1, blocks=216012, bytes = 1050464256

ioctl MTWEOF error on /dev/sa0. ERR=Input/output error.
Bad status from weof -1. ERR=Input/output error
Write failed.  Last block written=217073. stat=-1 ERR=No space left on device

*rewind
Rewound /dev/sa0
*scan
Starting scan at file 0
Bad status from read -1. ERR=Input/output error
217073 blocks of 64512 bytes in file 0
*