SCSI to IDE adapter that does not cost an arm and a leg?

Started by wizard1969, January 30, 2014, 12:22:04 pm

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wizard1969

Looking to replace the hard drive in my slab with a compact flash card or something else modern, and have noticed that the price of the ACARD 7720U  (mentioned in this thread: http://www.nextcomputers.org/forums/viewtopic.php?t=1616) is now over $250 on ebay, up from $35 mentioned in the thread. Could anyone recommend a different piece of hardware that is not so expensive?

mikeboss

October 12, 1988 Computing Advances To The NeXT Level


mikeboss

yes, this is the right one. just make sure you'll get it with the right firmware installed! the best working version (for black hardware) is V 3.86.
October 12, 1988 Computing Advances To The NeXT Level

wizard1969

Great, I ordered one. I sent him a message specifying wanting 3.86 firmware. Hopefully that gets through.

barcher174

I just found this:

http://www.codesrc.com/mediawiki/index.php?title=SCSI2SD

He is selling complete boards for $75. I went ahead and ordered one. I'll report back on how it works.

--
Brian

mikeboss

nice find! had to order one, too  :P  looks very promising, and the price seems very fair.
October 12, 1988 Computing Advances To The NeXT Level

cbrunschen

Quote from: "mikeboss"nice find! had to order one, too  :P  looks very promising, and the price seems very fair.


On the other hand, it only implements asynchronous transfers, and the performance appears ... less than stellar:
QuoteAs currently implemented:
Sequential read: 930kb/sec Sequential write: 900kb/sec


(I'm presuming that this means '930 kilobytes per second' and not 'kilobits per second'.)

Compare this to the CF AztecMonster, which offers write speeds of up to 5 MB/s (megabytes per second), and read speeds in excess of 15 MB/s - performance on average an order of magnitude better.

So for about twice as much money (the CF AztecMonster is $129, the SCSI2SD is AUS$75 which is about US$67) you get 10-ish times the speed. And for the same $129 you can get the AztecMonster II which lets you connect a SATA disk (including SSDs) and which offers more than 10 and up to almost 20 MB/s read and write, sustained, with big enough transactions.

barcher174

That is quite true, however when comparing the performance of these to a vintage drive I think these will still have the advantage in most cases (including heat and power consumption). Total cost on this is probably only $30 more than getting a vintage drive after shipping which make it appealing for those shopping on price.

pl212

Quote from: "mikeboss"yes, this is the right one. just make sure you'll get it with the right firmware installed! the best working version (for black hardware) is V 3.86.


Out of curiosity, do you know what in particular this fixes? Is there an easy way to upgrade the firmware? Have a 3.5" and 2.5" from ArtMix and would like to bring them both up-to-date...

thanks!

gtnicol

I keep hopping someone will offer something in the $50-$70 range... perhaps in kit form. Modern embedded controller should be fast enough to emulate most of SCSI. For example:

http://micha.freeshell.org/ramdisk/index.php

mikeboss

Quote from: "barcher174"I just found this:

http://www.codesrc.com/mediawiki/index.php?title=SCSI2SD

He is selling complete boards for $75. I went ahead and ordered one. I'll report back on how it works.

--
Brian


brian, did you get your SCSI2SD already? I received mine today, but it seems like this one's not compatible with black hardware. during boot I can see that the board is recognized but the cube just hangs at this stage...

will check now if it works properly with a 68k macintosh.
EDIT: the SCSI2SD adapter seems to work flawless in an LC-475

regards,
michael
October 12, 1988 Computing Advances To The NeXT Level

mikeboss

Quote from: "pl212"
Quote from: "mikeboss"yes, this is the right one. just make sure you'll get it with the right firmware installed! the best working version (for black hardware) is V 3.86.


Out of curiosity, do you know what in particular this fixes? Is there an easy way to upgrade the firmware? Have a 3.5" and 2.5" from ArtMix and would like to bring them both up-to-date...

thanks!


AFAIR with V 3.7 I got an error during boot but otherwise it'll work just fine. see this thread -> http://www.nextcomputers.org/forums/viewtopic.php?t=3019
October 12, 1988 Computing Advances To The NeXT Level

barcher174

I did get my SCSI2SD adapter, but also have not been able to get it to work. I tried a combination of every firmware option, but could only get it so far as printing the device label and then a hang. When I get time, I'll dig into the source and see if I can find any obvious red flags.

EDIT: If you look here you can see that there are hooks to capture what SCSI command it's failing at:

http://www.codesrc.com/gitweb/index.cgi?p=SCSI2SD.git;a=blob;f=software/SCSI2SD/SCSI2SD.cydsn/scsi.h;h=fe169544145de6a2ae4997c8bde1e8dbfc43af05;hb=6c8cbf54c6bd50fe5304d3616d8e8296d6968019

--
Brian

barcher174

Looks like there was a new firmware released which resolved the hang on boot issue. I've gotten a card to be recognized in nextstep, but still need to work on a disktab to make it bootable.

--
Brian