Date: Fri, 28 Mar 2014 16:59:44 -0400 From: Dan Langille <dan@langille.org> To: freebsd-scsi@freebsd.org Subject: Re: SYM8951U sees ch0 but not sa0 Message-ID: <0406d95c101f43765e03272ac1bbd62b@mailjail.langille.org> In-Reply-To: <5335DFAE.1050109@gmx.de> References: <831365dbd2a006fd36b7a1465d33fe00@mailjail.langille.org> <5335DFAE.1050109@gmx.de>
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On 2014-03-28 04:46 PM, Matthias Andree wrote: > Am 28.03.2014 19:58, schrieb Dan Langille: >> I have installed a Symbios Ultra2 32-bit PCI SCSI Adapter SYM8951U in >> my >> FreeBSD 9.2 system. Attached to it is a Compaq StorageWorks MSL5026 >> tape library. I have never used this library before, but it was given >> to me by someone who did use it. It worked at one time. >> >> The system sees the changer, but not the drive. I've tried swapping >> the >> SCSI cable and the LVD/SE terminator on the tape library ports. Same >> result. After each cable retry, I run 'camcontrol rescan all'. >> >> [dan@knew:/dev] $ ls *sa* *ch* >> ls: *sa*: No such file or directory >> ch0 >> [dan@knew:/dev] $ >> >> Any ideas? Suggestions? Card settings? >> >> I conclude the cable is OK, given that I can get a list of the tapes >> in >> the library. >> >> The front panel of the library sees the tape drive. It has a SCSI ID >> assigned. > > I haven't much experience with multi-LUN devices, nor tape libraries, > but OTOH I haven't had issues with Symbios (NCR, LSI) controllers + > bare > tape drives so far [*] > > - Is that drive's ID a separate target ID, or is it a LUN? > + If it's a LUN, is it <= 7? > + If it's a LUN, do the SYMBIOS settings permit scanning for LUNs at > all? (Although it's not entirely clear to me from sym(4) if rescan > would > scan LUNs.) I do not know, but I will check when I am next at the tape library. I wonder if that's a configuration item. FWIW, the previous owner of this tape library was not running FreeBSD, I'm sure. > - Does camcontrol reportluns help any? $ sudo camcontrol reportluns 7:3:0 1 LUN found 0 > - Can you have the host adaptor's BIOS scan the BUS and report devices > and LUNs and see if that differs from FreeBSD's view of the world? I did that the first time I booted the system. It may have been without the terminators attached. I photographed the console screen at the time The host adaptor's BIOS shows only the MSL5000, then, while booting, the Symbios displayed the MSL5000 as ID 3 and the card as ID 7. > __________ > [*] One exception though: Tekram DC-390U were using the Ultra+Wide > 53C875 chip but an 8-bit connector and used to cause hitches when > connecting UW devies, at least with older drivers. I forgot if I ever > checked whether this was ever fixed... It's knowledge like that which makes group lists so valuable. -- Dan Langille - http://langille.org/
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