Re: Acerscan 620ST scanner termination problem?
- From: "Mr. Chuck" <tchuck@xxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 31 Aug 2005 02:44:47 GMT
No do not plug a terminator into the scanner, it will cause more problems. I
have one of these units and it does not play well with anything else on the
bus with it. Originally it came with an acard with DB25 connector.
Disconnect the internal bus to verify that the scanner works properly and I
suggest a separate inexpensive card preferably 10mbit max PCI card and you
should be in business.
HTH
MrC
"Marco van Loon" <nobody@xxxxxxxxxxxxxxx> wrote in message
news:11grma0195oqa80@xxxxxxxxxxxxxxxxxxxxx
> Some time ago I bought a used Acerscan 620ST SCSI scanner.
>
(http://www.benq-eu.com/ServiceAndSupport/downloads/downloads.cfm?product=88
)
> When plugged into the ISA ncr53c400a SCSI card that was supplied with it,
> it 'functioned', but because of the card's "pseudo-DMA" mode (the PC's
> CPU 100% stressed, but a simple scan takes 10+ minutes) it just wasn't
> workable...
> So I bought a HD50 <-> DB25 cable to hook the scanner up to one of
> my SCSI cards.
> PC1: OS Linux, Initio 4203a [1] SCSI card, Yamaha CD-R, Toshiba DVD-ROM
hooked
> up to the internal cable - after hooking the scanner up and running
> 'cdrecord -scanbus', I get a SCSI timeout and a SCSI bus reset
logged
> and then the PC completely locks up.
> PC2: OS Linux, LSILogic 20860 [2] SCSI card, TEAC CD-532S CD-ROM drive
hooked
> up to the internal cable - after hooking the scanner up and
> running 'cdrecord -scanbus', I get SCSI timeouts and SCSI bus resets
[3]
> but fortunately no lock ups. IIRC, after about 10-20 minutes I
aborted
> the bus scan, since it seemed to be going nowhere, just giving me
> timeouts and resets...
>
> For lack of documentation (dozens of pages on some windoze scan software
> I won't be using, 0 on setting up the SCSI part of the scanner...) and
> lack of other options I assumed the mini dial at the back of the scanner
> with the numbers 0-9 around it must be the way to set SCSI ID, so I set it
> to '3' which is free on the busses of both SCSI cards. [4]
> AFAIK I jumpered my optical drives appropriately (the ones at the end of
> the cables as terminated, the one in the middle as not terminated) .
> The manual of the LSILogic card lists it as auto-terminating; the manual
> of the Initio card is less clear on this point...
>
>
> Do the above symptoms mean I have a termination problem and have to plug
> a terminator into the second DB25 connection on the scanner? [5]
> If yes, does a passive terminator [6] suffice or do I need an active
> terminator? (passive seems to start at EUR 5, active at EUR 20...)
>
>
> Marco van Loon
> [1]http://www.ioiscsi.com/products/4203a.shtml
> [2]http://www.lsilogic.com/products/scsi_hbas/lsi20860.html
> [3]
> ncr53c860-0-<6,*>: FAST-20 SCSI 20.0 MB/s (50 ns, offset 8)
> scsi : aborting command due to timeout : pid 1546, scsi1, channel 0, id 6,
> lun 0 0x25 00 00 00 00 00 00 00 00 00
> ncr53c8xx_abort: pid=1546 serial_number=1547 serial_number_at_timeout=1547
> ncr53c860-0: abort ccb=cfa07800 (cancel)
> SCSI host 1 abort (pid 1546) timed out - resetting
> SCSI bus is being reset for host 1 channel 0.
> ncr53c8xx_reset: pid=1546 reset_flags=2 serial_number=1547
> serial_number_at_timeout=1547
> ncr53c860-0-<6,*>: FAST-20 SCSI 20.0 MB/s (50 ns, offset 8)
> scsi : aborting command due to timeout : pid 1552, scsi1, channel 0, id 6,
> lun 0 0x28 00 00 00 00 00 00 00 02 00
> ncr53c8xx_abort: pid=1552 serial_number=1553 serial_number_at_timeout=1553
> SCSI host 1 abort (pid 1552) timed out - resetting
> SCSI bus is being reset for host 1 channel 0.
> ncr53c8xx_reset: pid=1552 reset_flags=2 serial_number=1553
> serial_number_at_timeout=1553
> ncr53c860-0-<6,*>: FAST-20 SCSI 20.0 MB/s (50 ns, offset 8)
>
> [4] and it seems I was right in that regard: when plugging the scanner
> back into the crummy ncr53c400a card, 'cdrecord -scanbus' now reports:
> scsibus1:
> 1,0,0 100) *
> 1,1,0 101) *
> 1,2,0 102) *
> 1,3,0 103) 'Color ' 'FlatbedScanner_9' '0113' Scanner
> 1,4,0 104) *
> 1,5,0 105) *
> 1,6,0 106) *
> 1,7,0 107) *
>
> [5] it has a symbol that looks a bit like the following next to it:
> /\
> / _\_
> \ /
> \/
> [6]http://www.alternate.nl/html/shop/productDetails.html?artno=RTS%2301&;
>
>
> --
> Marco van Loon
.
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