You do need to jumper it if it is to be run in Ultra-Wide Single Ended (SE) mode, which is the only way to run the drive if you have a 2940UW or do not yet have U2W support for your 2940U2W.
Lawrence wrote: > you don't need to jumpper the seagate cheetah lp scsi hard disk, it is > auto-detected. According to seagate, you will see a burst if plug your > u2w hard disk in u2w controller. > > Lawrence > > Christopher Barry wrote: > > > > A lot of U2W disk drives can be jumpered to run in UW single ended mode, so > > that they > > can be run on a 2940UW or a 2940U2W without the U2W connecter working yet. > > I should note > > though that the cable that comes with U2W controllers (part # ACK-68I-U2W) > > uses a > > differential terminator and cannot be used to connect U2W drives to a > > 2940UW or to the > > UW connector on a 2940U2W and this is important because U2W drives being > > truly > > differential, like SCA drives, come with no means to provide termination, > > which must be > > provided by the cable. I've just had some email with Adaptec and Seagate > > about this > > because I might buy a second generation Seagate Cheetah which is a lot > > faster than the > > first generation Cheetah but is only available with U2W or better > > interfaces, and I see > > no need to spend over $300 for a new motherboard or 2940U2W card when I'm > > very happy > > with my 2940UW. So I'm ordering the U2W Cheetah and Adaptec's actively > > terminated UW > > ribbon cable (ACK-W2W-5IT) and I'm set. > > > > I only bothered to write this because if you already have a U2W controller > > you can run > > U2W drives under Linux right now and you don't need to wait if you already > > possess or > > purchase an actively terminated UW cable and if you are interested in > > running a U2W > > drive without U2W SCSI you'll probably be able to so also without spending > > extra cash > > for an interface that provides 3-4 times more bandwidth you'll ever need > > unless you have > > a RAID. > > > > Markus Lechner wrote: > > > > > Hi Lawrence, > > > > > > I read on the kernel-list that the new boards run all except U2W - but > > > they > > > are working on it and it may soon be done. You can use the other > > > SCSI-Parts up to UW-SCSI without any problems. You simply can't use the > > > U2W-Part of your controller until they (the kernel and driver > > > developers) > > > get it done. I'm buying a new MB with U2W in a week, for example :) > > > > > > ok, > > > > > > Mac > > > > > > Lawrence wrote: > > > > > > > > Does the current adaptec driver support Adaptec 2940U2W (Ultra2 Wide) > > > > scsi card? > > > > > > > > Lawrence > > > > > > > > -- > > > > Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] < /dev/null > > > > > > -- > > > Markus Lechner (Company - LightWolf) | The > > > Prometheus-Project > > > [EMAIL PROTECTED] | > > > [EMAIL PROTECTED] > > > http://home.munich.netsurf.de/Markus.Lechner | (only for > > > Project-Team) > > > PGP-Public-Key(s) are available | > > > > > > -- > > > Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] < /dev/null > > > > > -- > Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] < /dev/null > -- Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] < /dev/null
