Date: Sun, 12 Dec 1999 11:27:58 -0500 From: John <papalia@UDel.Edu> To: David Bein <bein@pyramid.com> Cc: freebsd-questions@freebsd.org Subject: Re: Adaptec/SCSI question ... Message-ID: <4.1.19991212111457.00954a60@mail.udel.edu> In-Reply-To: <945003920/bein@sanity.mass.pyramid.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi David - Last i looked, there were a few flavors of Adaptec (AHA) 2940: 2940 = I didn't think a plain old 2940 existed, but odds are that it's just plain old SCSI 2 on a 50 Pin connector (both internal and external) 2940UW = SCSI 2 (50 Pin) and SCSI 3 (68 Pin) internal connectors and a 68 Pin external connector. You can only use two of the three connectors (ie: You can not form a "Y" pattern of devices.. it must be straight through. So if you use the external connector, you can only use the 50 pin OR the 68 pin internal connector) 2940U2W = "Ultra 2 Wide" This one handles all U2W (LVD) devices. This one has a whole MESS of connectors: * One 68 Pin for U2W (internal) * One 68 Pin for UW (internal) * One 50 Pin for SCSI 2 and below (internal) * One 68 Pin for U2W (external) * One 50 Pin for SCSI 2 and below (external) Supposedly to get that 50 pin external to exist you have to use and internal-to-external cabling kit. I am *NOT* sure how to 2940U2W works for which ports you can use in which configurations, but I'm going to go out on a limb and say that, once again, you can't put the devices in a "Y" pattern. As for running your internal cables to the outside, on the surface it seems to me a logistical problem - connectors for internal devices do not have the same mating parts as those for external connectors. Additionally, if you slap on an external device, you'll need to power it somehow. Externals usually come in an external housing, which require an external cable and & plug into the wall. My personal preference is to try to keep everything "inside the box" until: a) heat generated is too much, b) there's no more room, or c) the device I want doesn't fit well internally. I think that call is up to you. Oh... and internal cables are a HECK of a lot cheaper than external ones ;) Hope that all helps ya get moving... BTW - if the last thing you tacked on your email is a copy of your dmesg output, it seems that you have a lot of devices enabled in your kernel which you do NOT have installed. Have you built yourself a custom kernel yet? Regards, John >Hi ... > > I am looking into purchasing a second hard drive and as >well some kind of removable media. I am confused about >whether the Adaptec 2940 I have is the same as a product >I see in the stores advertised as "2940U2W" or if what >I have is different. I would also like to know if using >the external SCSI port on the back is a better idea than >running a cable from the inside using the internal cabling. > > Any help/advise would be most welcome. > > Thank you ... > >--David > >Copyright (c) 1992-1998 FreeBSD Inc. >Copyright (c) 1982, 1986, 1989, 1991, 1993 > The Regents of the University of California. All rights reserved. > >FreeBSD 2.2.8-RELEASE #0: Sat Jul 17 07:26:50 EDT 1999 > bein@sanity.mass.pyramid.com:/usr/src/sys/compile/SANITY >CPU: Pentium II (266.32-MHz 686-class CPU) > Origin = "GenuineIntel" Id = 0x634 Stepping=4 > >Features=0x80f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV, MMX> >real memory = 67108864 (65536K bytes) >avail memory = 63021056 (61544K bytes) >Probing for devices on PCI bus 0: >chip0 <generic PCI bridge (vendor=8086 device=7180 subclass=0)> rev 3 on >pci0:0:0 >chip1 <generic PCI bridge (vendor=8086 device=7181 subclass=4)> rev 3 on >pci0:1:0 >chip2 <Intel 82371AB PCI-ISA bridge> rev 2 on pci0:7:0 >chip3 <Intel 82371AB IDE interface> rev 1 on pci0:7:1 >chip4 <Intel 82371AB USB interface> rev 1 int d irq 11 on pci0:7:2 >chip5 <Intel 82371AB Power management controller> rev 2 on pci0:7:3 >fxp0 <Intel EtherExpress Pro 10/100B Ethernet> rev 5 int a irq 10 on pci0:9:0 >fxp0: Ethernet address 08:00:06:0c:39:bd >xl0 <3Com 3c900B Etherlink XL 10BaseT Combo> rev 4 int a irq 10 on pci0:18:0 >xl0: Ethernet address: 00:10:5a:09:3f:e9 >xl0: selecting BNC port, half duplex >ahc0 <Adaptec 2940 Ultra SCSI host adapter> rev 1 int a irq 9 on pci0:19:0 >ahc0: aic7880 Wide Channel, SCSI Id=7, 16 SCBs >ahc0 waiting for scsi devices to settle >(ahc0:0:0): "IBM DCAS-34330W S65A" type 0 fixed SCSI 2 >sd0(ahc0:0:0): Direct-Access 4134MB (8467200 512 byte sectors) >Probing for devices on PCI bus 1: >vga0 <VGA-compatible display device> rev 2 int a irq 9 on pci1:0:0 >Probing for devices on the ISA bus: >sc0 at 0x60-0x6f irq 1 on motherboard >sc0: VGA color <16 virtual consoles, flags=0x0> >ed0 not found at 0x280 >fe0 not found at 0x300 >sio0 at 0x3f8-0x3ff irq 4 on isa >sio0: type 16550A >sio1 at 0x2f8-0x2ff irq 3 on isa >sio1: type 16550A >lpt0 at 0x378-0x37f irq 7 on isa >lpt0: Interrupt-driven port >lp0: TCP/IP capable interface >lpt1 not found at 0xffffffff >mse0 not found at 0x23c >psm0 at 0x60-0x64 irq 12 on motherboard >psm0: model Generic PS/2 mouse, device ID 0 >fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa >fdc0: FIFO enabled, 8 bytes threshold >fd0: 1.44MB 3.5in >wdc0 not found at 0x1f0 >wdc1 at 0x170-0x177 irq 15 on isa >wdc1: unit 0 (atapi): <HITACHI CDR-8430/0024>, removable, accel, dma, iordis >wcd0: 2412/5512KB/sec, 128KB cache, audio play, 255 volume levels, ejectable >tray >wcd0: no disc inside, unlocked >bt0 not found at 0x330 >uha0 not found at 0x330 >aha0 not found at 0x330 >aic0 not found at 0x340 >nca0 not found at 0x1f88 >nca1 not found at 0x350 >sea0 not found >wt0 not found at 0x300 >mcd0 not found at 0x300 >matcdc0 not found at 0x230 >scd0 not found at 0x230 >ie0: unknown board_id: f000 >ie0 not found at 0x300 >ep0 not found at 0x300 >ex0 not found at 0xffffffff >le0 not found at 0x300 >lnc0 not found at 0x280 >ze0 not found at 0x300 >zp0 not found at 0x300 >npx0 flags 0x1 on motherboard >npx0: INT 16 interface > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4.1.19991212111457.00954a60>