uhub4 at uhub0 port 5 "NEC product 0x005a" rev 2.00/1.00 addr 2
  umass0 at uhub4 port 1 configuration 1 interface 0 "TOSHIBA TransMemory" rev 2.00/1.10 addr 3
  umass0: using SCSI over Bulk-Only
  scsibus2 at umass0: 2 targets, initiator 0
  sd0 at scsibus2 targ 1 lun 0: <TOSHIBA, TransMemory, PMAP> SCSI0 0/direct removable
  sd0: 961MB, 512 bytes/sec, 1968128 sec total
 >uhub4 at uhub0 port 5 "NEC product 0x005a" rev 2.00/1.00 addr 2 ~
 umass0 at uhub4 port 1 configuration 1 interface 0 "TOSHIBA TransMemory" rev 2.00/1.10 addr 3 ~
 umass0: using SCSI over Bulk-Only ~
 scsibus2 at umass0: 2 targets, initiator 0 ~
 sd0 at scsibus2 targ 1 lun 0: <TOSHIBA, TransMemory, PMAP> SCSI0 0/direct removable ~
 sd0: 961MB, 512 bytes/sec, 1968128 sec total
 
 |mount /dev/sd0d /mnt|>|>|cd /mfs &&&br;time pax -rwpe . /mnt/tmp/.|>|>|cd /mfs/tmp &&&br;time rm -rf *|
 |mount option   |real|user   |system  |real     |user   |system |
 |none           |24m18.37s|0m1.15s|0m16.58s|14m54.99s|0m0.26s|0m5.70s|
 |noatime        |23m56.60s|0m1.03s|0m16.95s|14m32.22s|0m0.42s|0m5.59s|
 |async          |07m28.74s|0m0.79s|0m14.29s|00m06.91s|0m0.24s|0m1.90s|
 |async,noatime  |07m29.09s|0m0.87s|0m14.97s|00m07.02s|0m0.19s|0m2.06s|
 |softdep        |09m55.40s|0m0.73s|0m15.59s|04m23.48s|0m0.24s|0m2.17s|
 |softdep,noatime|09m54.15s|0m0.90s|0m15.05s|04m27.81s|0m0.21s|0m1.99s|
 
  #!/bin/sh
  
  for opt in none noatime async noatime,async softdep softdep,async
  do
      if [ X$opt = Xnone ]
      then
          opt=""
      else
          opt="-o $opt"
      fi
  
      echo ==== opt: $opt ====
  
      if mount $opt /dev/sd0d /mnt
      then
          cd /mfs/ && time pax -rwpe . /mnt/tmp/.
          umount /mnt
          sleep 60
      fi
  
      if mount $opt /dev/sd0d /mnt
      then
          cd /mnt/tmp && time rm -rf *
          cd
          umount /mnt
          sleep 60
      fi
  done
 
 |mount /dev/sd0d /mnt|>|>|cd /mfs &&&br;time pax -rwpe . /mnt/tmp/.|>|>|cd /mfs/tmp &&&br;time rm -rf *|
 |mount option   |real|user   |system  |real     |user   |system |
 |none           |24m18.37s|0m1.15s|0m16.58s|14m54.99s|0m0.26s|0m5.70s|
 |noatime        |23m56.60s|0m1.03s|0m16.95s|14m32.22s|0m0.42s|0m5.59s|
 |async          |07m28.74s|0m0.79s|0m14.29s|00m06.91s|0m0.24s|0m1.90s|
 |async,noatime  |07m29.09s|0m0.87s|0m14.97s|00m07.02s|0m0.19s|0m2.06s|
 |softdep        |09m55.40s|0m0.73s|0m15.59s|04m23.48s|0m0.24s|0m2.17s|
 |softdep,noatime|09m54.15s|0m0.90s|0m15.05s|04m27.81s|0m0.21s|0m1.99s|
 
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