HP Ultrium 230 Performance
From Wikistix
Drive info
st1 at scsibus1 target 6 lun 0: <HP, Ultrium 1-SCSI, E16V> tape removable st1: drive empty st1: sync (25.00ns offset 15), 16-bit (80.000MB/s) transfers
Controller info
ahc0 at pci2 dev 12 function 0: Adaptec 29160B Ultra160 SCSI adapter ahc0: interrupting at ioapic0 pin 20 (irq 5) ahc0: aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs scsibus1 at ahc0: 16 targets, 8 luns per target
System info
NetBSD 3.0 (ZION) #4: Thu Jan 19 17:07:58 EST 2006 total memory = 1023 MB avail memory = 996 MB cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel Pentium 4 (686-class), 2806.50 MHz, id 0xf25 cpu0: "Intel(R) Pentium(R) 4 CPU 2.80GHz"
Raw/native tape performance
Using a pseudo-random stream:
zion:ksh$ fblckgen -rb 64k -c 160k > /dev/nrst1 10737418240 bytes written in 703.142 secs (14912.720 KB/sec) zion:ksh$ mt -f /dev/nrst1 rewind zion:ksh$ dd if=/dev/nrst1 bs=64k of=/dev/null 163840+0 records in 163840+0 records out 10737418240 bytes transferred in 711.374 secs (15093914 bytes/sec)
Compressible data performance
Using a repeating ASCII sequence:
zion:ksh$ fblckgen -ab 64k -c 160k > /dev/nrst1 10737418240 bytes written in 166.968 secs (62801.003 KB/sec) zion:ksh$ mt -f /dev/nrst1 rewind zion:ksh$ dd if=/dev/nrst1 bs=64k of=/dev/null 163840+0 records in 163840+0 records out 10737418240 bytes transferred in 219.937 secs (48820426 bytes/sec)
Raw/native capacity
zion:ksh$ fblckgen -r -b 64k -c 0 > /dev/nrst1 Write failed: Input/output error -1 bytes, 1613201 full blocks written. 105722740736 bytes written in 7064.506 secs (14614.590 KB/sec)
Integrity check
zion:ksh$ mkfifo /tmp/f zion:ksh$ sha1 /tmp/f & [1] 3998 zion:ksh$ fblckgen -r -b 64k -c 16k | tee /tmp/f | dd obs=64k of=/dev/nrst1 1073741824 bytes written in 69.365 secs (15116.847 KB/sec) SHA1 (/tmp/f) = 55e6bb7e75fdbee7b751eade6831bc382c3c3169 2097152+0 records in 16384+0 records out 1073741824 bytes transferred in 72.644 secs (14780874 bytes/sec) [1] + Done sha1 /tmp/f zion:ksh$ mt -f /dev/nrst1 rewind zion:ksh$ dd if=/dev/nrst1 bs=64k | sha1 16384+0 records in 16384+0 records out 55e6bb7e75fdbee7b751eade6831bc382c3c3169 1073741824 bytes transferred in 69.454 secs (15459755 bytes/sec)
Thorough Integrity Check
zion:ksh$ fblckgen -vrb 64k -c 1500k | mbdd -n 640 /dev/nrst0 | sha1 | 6842.4s 98299008.0 KiB 15381 KiB/s decaying avg 100.0% done ETR 0.3s 100663296000 bytes written in 6843.219 secs (14365.169 KiB/sec) 201326592000 bytes transferred in 6845.848 secs (28719.305 KiB/sec) 0 partial reads, 319.519 average buffers full 82ea8af67cbd4be231f16a54f14e98ddf9137d73 zion:ksh$ mt -f /dev/nrst0 rewind zion:ksh$ mbdd -vc 1500k -n 640 < /dev/nrst0 | sha1 / 6603.1s 98303936.0 KiB 15358 KiB/s decaying avg 100.0% done ETR 0.0s 100663296000 bytes transferred in 6605.813 secs (14881.437 KiB/sec) 0 partial reads, 0.264 average buffers full 82ea8af67cbd4be231f16a54f14e98ddf9137d73