impala Posted May 28, 2002 Report Share Posted May 28, 2002 Mac G3 (Blue & white) ; G4 (without AGP); G4 (with AGP) Adaptec 2940UW (Ultra-Wide) SCSI card, firmware updated Retro 4.3 using backup server Mac IP clients Windows clients DLT 4000 tape drive (Fast SCSI) AIT tape drive (Fast-Wide SCSI) On the G3, Retrospect happily used the DLT tape drive with the Adaptec SCSI card. Yes, I have terminating wide to narrow adaptec scsi cables. The G3 was too slow for the AIT drive. Recently I have a spare 2yr old G4 with MacOS 9.0x on it. I transfer everything to the G4 hoping for more throughput. Including the Adaptec 2940 SCSI card. Throughput is terrible for both DLT and AIT. Switch to the OEM Narrow SCSI card and throughput is better than G3 for DLT, but not for the wide AIT. Then I try a 1yr old G4 with MacOS 9.1. Same thing. I call adaptec and they tell me (incorrectly) the scsi card is out of warranty. I have yet to call back. Is there a problem with Adaptec 2940UW cards and Mac G4? Is there a problem with Adaptec 2940UW cards and Mac OS 9.x? Is there a problem with Adaptec 2940UW cards and Retrospect? Is there a problem with Adaptec 2940UW cards and tape drives? Is there some other problem? If I'm going to replace this with a new SCSI card for a 1yr old G4, which one do I get? See my next post... Link to comment Share on other sites More sharing options...
AmyJ Posted May 30, 2002 Report Share Posted May 30, 2002 The Adaptec 2940 is fully unsupported by Retrospect on OS X. This adapter was heavily tested and failed in every case. When Retrospect attempts to send data to a tape drive attached to the 2940 card, a kernel panic occurs immediately. The problem is with the Adaptec78XXSCSI.kext kernel extension. Apple is looking into this issue right now. Hopefully a fix for this incompatibility will be released in an upcoming version of Mac OS X. For a list of adapters that have gone through preliminary testing by Dantz, please see: www.dantz.com/index.php3?SCREEN=osx_scsi_adapter Link to comment Share on other sites More sharing options...
impala Posted May 31, 2002 Author Report Share Posted May 31, 2002 Thanks for the info, but I'm still using Retro 4.3 on Mac OS 9.x (one 9.04 and one 9.2). I'm pretty sure the 2940 was supported by classic MacOS at one point, but it is not working now. Link to comment Share on other sites More sharing options...
MikeBSC Posted January 29, 2003 Report Share Posted January 29, 2003 I am having this problem as well. I found some information about upgrading the driver using the 2930 driver from Adaptec's site and did so, but the kernel panics comtinue. I'm using OS 10.2.3 Any suggestions? Here's the informaiton from system profiler: SLOT-5: +----------------------------------------------------------------------+ | | | Card Type : scsi-2 | | Card Name : ADPT,2940U2B | | Card Model : ADPT,1757800-00 | | Vendor ID : 9005 | | Device ID : 10 | | ROM# : 1.1 | | Revision : 1 Thanks! -Mike Link to comment Share on other sites More sharing options...
waldorfm Posted January 30, 2003 Report Share Posted January 30, 2003 From what I read about 1 year ago, Adaptec and Apple have stopped supporting the 2940's, even the ones that came from Apple. There was trade in program for 29160, etc., replacement. The 2940's (apple's) seems to work fine in 10.1.5, but I have not tried it under 10.2. Link to comment Share on other sites More sharing options...
waldorfm Posted January 30, 2003 Report Share Posted January 30, 2003 BTW: According to Adaptec you should always have a tape device on a different scsi bus than your harddrives, due to different timings (async vs. sync). The 2940 has a one scsi bus only. Link to comment Share on other sites More sharing options...
MikeBSC Posted January 31, 2003 Report Share Posted January 31, 2003 Thanks for the information. Looks like it's time to upgrade... Link to comment Share on other sites More sharing options...
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