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randy
Guest
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 Posted: Thu Sep 21, 2006 10:30 am Post subject: Performance of Quantum LTO2 drive with Adaptec 1480 |
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I just bought a Quantum LTO2HH Ultrium 2 drive, Ultra 160 SCSI, 160MBps
burst, with SCSI 68-pin connector.
I am going to use it with an Adaptec 1480 Cardbus, Fast SCSI 10MBps,
Ultra SCSI 20MBps, Host SCSI 132 MBps, with 50-pin SCSI connector.
I have a regular, common, SCSI 68-50 pin converter.
What effect this converter will have ? Does it act as a choke and
reduce the transfer and burst rate to Ultra SCSI 20MBps speed ?
Should I use the Adaptec USB2Xchange or Ratoc FW/SCSI or Ratoc
USB2/SCSI converter instead for maximum performance ? |
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wolfgang schneider
Guest
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| Posted: Thu Sep 21, 2006 12:14 pm Post subject: Re: Performance of Quantum LTO2 drive with Adaptec 1480 |
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hi ,
in my limited opinion ( hi folki ) you should use an ultra 160 or ultra
320 controller with 68pin lvd-cable to have the full speed on this ultra
160 drive .
In article <1158816602.986960.321870@m7g2000cwm.googlegroups.com>,
Randy_Miyazaki@MyRealBox.com says...
| Quote: | I just bought a Quantum LTO2HH Ultrium 2 drive, Ultra 160 SCSI, 160MBps
burst, with SCSI 68-pin connector.
..................................
Should I use the Adaptec USB2Xchange or Ratoc FW/SCSI or Ratoc
USB2/SCSI converter instead for maximum performance ?
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--
gravity is still active
-<--@
gruss , wolfgang |
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randy
Guest
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| Posted: Thu Sep 21, 2006 12:57 pm Post subject: Re: Performance of Quantum LTO2 drive with Adaptec 1480 |
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hi,
I travel thru the U.S.A. in my minivan regularly and have only 1
laptop. I could take a desktop, but would rather not. Currently my Sony
SDT-11000 DDS4 tape drive (68-pin SCSI) reads/writes tapes twice as
fast, with an Adaptec 1480 (16 bit) Cardbus card, as with an Adaptec
1460 (8 bit) PCMCIA card (approximately 2hr 40min per tape, versus 5hr
20min).
Let me re-phrase the question. With my new Quantum drive, I would like
to know, for the best performance on a laptop, which should I use:
1) Adaptec USB2Xchange adapter
2) Ratoc USB2-SCSI adpater
3) Ratoc Firewire-SCSI adapter
4) Adaptec SCSI 1480 Cardbus card
Currently I own 4), and do not have 1), 2), and 3). So any suggestions
or advice would be appreciated.
Thanks.
| Quote: | hi ,
in my limited opinion ( hi folki ) you should use an ultra 160 or ultra
320 controller with 68pin lvd-cable to have the full speed on this ultra
160 drive .
In article <1158816602.986960.321870@m7g2000cwm.googlegroups.com>,
Randy_Miyazaki@MyRealBox.com says...
I just bought a Quantum LTO2HH Ultrium 2 drive, Ultra 160 SCSI, 160MBps
burst, with SCSI 68-pin connector.
..................................
Should I use the Adaptec USB2Xchange or Ratoc FW/SCSI or Ratoc
USB2/SCSI converter instead for maximum performance ?
--
gravity is still active
-<--@
gruss , wolfgang |
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Folkert Rienstra
Guest
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| Posted: Thu Sep 21, 2006 7:59 pm Post subject: Re: Performance of Quantum LTO2 drive with Adaptec 1480 |
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"randy" <Randy_Miyazaki@MyRealBox.com> wrote in message news:1158825464.564605.281610@i42g2000cwa.googlegroups.com
| Quote: | hi,
I travel thru the U.S.A. in my minivan regularly and have only 1
laptop. I could take a desktop, but would rather not. Currently my
Sony SDT-11000 DDS4 tape drive (68-pin SCSI)
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40 GB Capacity and 4.8 MB/s
| Quote: | reads/writes tapes twice as fast, with an
Adaptec 1480 (16 bit) Cardbus card,
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20MB/s
| Quote: | as with an Adaptec 1460 (8 bit) PCMCIA card
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"Data Transfer Rate
Up to 2MB/sec PC Card bus rate
Up to 10MB/sec synchronous burst rate on SCSI bus"
So effectively 2MB/s
| Quote: | (approximately 2hr 40min per tape,
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40,000MB/160/60 = 4.2 MB/s , very good.
| Quote: | versus 5hr 20min).
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2MB/s limited by Carbus as expected.
| Quote: |
Let me re-phrase the question.
With my new Quantum drive,
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24MB/s
| Quote: | I would like to know, for the best performance on a laptop, which should I use:
1) Adaptec USB2Xchange adapter
2) Ratoc USB2-SCSI adpater
3) Ratoc Firewire-SCSI adapter
4) Adaptec SCSI 1480 Cardbus card
Currently I own 4),
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Going by 4.1/4.8 on your Sony you would need 21MB/s, (assuming that your laptop
and file system can provide that). Your 1480 card can deliver ~15MB/s or so.
It will depend on how much the tapedrive can adapt its streaming to that difference whether that is a problem and/or how much money
you want to spend to get the maximum
performance (i.e. 45 minutes vs 32 minutes waiting time per tape).
What's the cost of a coffee break.
| Quote: | and do not have 1), 2), and 3). So any suggestions or advice would be appreciated.
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Anything that has a bottleneck of better than 24MB/s on either side should do.
Check the specs. Just try out your 1480 card first. It may well suffice your needs.
[very poor attempt at a troll by wolfie snipped] |
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Folkert Rienstra
Guest
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| Posted: Thu Sep 21, 2006 8:00 pm Post subject: Re: Performance of Quantum LTO2 drive with Adaptec 1480 |
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"randy" <Randy_Miyazaki@MyRealBox.com> wrote in message news:1158816602.986960.321870@m7g2000cwm.googlegroups.com
| Quote: | I just bought a Quantum LTO2HH Ultrium 2 drive, Ultra 160 SCSI, 160MBps
burst, with SCSI 68-pin connector.
I am going to use it with an Adaptec 1480 Cardbus, Fast SCSI 10MBps,
Ultra SCSI 20MBps, Host SCSI 132 MBps, with 50-pin SCSI connector.
I have a regular, common, SCSI 68-50 pin converter.
What effect this converter will have ? Does it act as a choke and
reduce the transfer and burst rate to Ultra SCSI 20MBps speed ?
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No, the 1480 is 20MB/s narrow already so there's no chocking at all.
The tape drive has to be terminated anyway so your simple 68-50 pin
convertor should do fine.
| Quote: |
Should I use the Adaptec USB2Xchange or Ratoc FW/SCSI or Ratoc
USB2/SCSI converter instead for maximum performance ?
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See other post. |
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Eric Gisin
Guest
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| Posted: Fri Sep 22, 2006 6:41 pm Post subject: Re: Performance of Quantum LTO2 drive with Adaptec 1480 |
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You are a moron. SCSI is a way beyond your single digit IQ.
"wolfgang schneider" <schnusi@gmx.net> wrote in message
news:MPG.1f7c588788b3a77e9896c5@news.individual.de...
| Quote: | hi ,
in my limited opinion ( hi folki ) you should use an ultra 160 or ultra
320 controller with 68pin lvd-cable to have the full speed on this ultra
160 drive .
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randy
Guest
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| Posted: Sat Sep 23, 2006 4:26 pm Post subject: Re: Performance of Quantum LTO2 drive with Adaptec 1480 |
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thanks for the replies.
when the Quantum/LTO2 drive arrives this wednesday i'll try it with the
Adaptec 1480 card.
I may buy an Adaptec Usb2xchange adapter cable in order to free up the
cardbus slot for other cards. I've been running shell scripts to backup
my files, and run it under cygwin.
Does the Adpatec Usb2xchange card show up as /dev/nst0 ? or similar ?
in other words, with the Usb2xchange, can i still run my cygwin shell
scripts ? |
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