aperezbios

Preliminary ZuluSCSI DDS Tape drive emulation results

May 12th, 2023
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  1. [root@PW490 ~]# lsscsi
  2. [0:0:0:0] disk ATA ExcelStor Techno A52A /dev/sda
  3. [6:0:0:0] cd/dvd HL-DT-ST DVD-ROM GDR8164B 0D08 /dev/sr0
  4. [8:0:6:0] tape ZULUSCSI TAPE 2.0 /dev/st0
  5.  
  6. [root@PW490 ~]# mt -f /dev/st0 status
  7. SCSI 2 tape drive:
  8. File number=0, block number=0, partition=0.
  9. Tape block size 8192 bytes. Density code 0x13 (DDS (61000 bpi)).
  10. Soft error count since last status=0
  11. General status bits on (41010000):
  12. BOT ONLINE IM_REP_EN
  13.  
  14. [root@PW490 ~]# time tar -cvf /dev/st0 -b 512 SCSI-tape-test-file-39MB
  15. SCSI-tape-test-file-39MB
  16.  
  17. real    0m7.369s
  18. user    0m0.015s
  19. sys     0m0.238s
  20. [root@PW490 ~]#
  21. [root@PW490 ~]# time tar -cvf /dev/st0 -b 512 SCSI-tape-test-file-113MB
  22. SCSI-tape-test-file-113MB
  23.  
  24. real    0m18.283s
  25. user    0m0.011s
  26. sys     0m0.660s
  27. [root@PW490 ~]# time tar -cvf /dev/st0 -b 512 SCSI-tape-test-file-516MB
  28. SCSI-tape-test-file-516MB
  29.  
  30. real    1m35.885s
  31. user    0m0.019s
  32. sys     0m2.021s
  33.  
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