Date: Fri, 19 Mar 1999 21:53:55 +0100 (CET) From: Frederic LOYER <loyer@ensta.fr> To: grog@lemis.com (Greg Lehey) Cc: freebsd-hardware@FreeBSD.ORG Subject: Re: ADR tape drives? Message-ID: <199903192053.VAA15480@quickstep.ensta.fr> In-Reply-To: <19990317094313.I429@lemis.com> from Greg Lehey at "Mar 17, 1999 9:43:13 am"
next in thread | previous in thread | raw e-mail | index | archive | help
> I've just been pointed at OnStream's ADR drives > (http://www.onstream.com/server/index.html). Does anybody know > anything about them? What would we need to get the IDE/ATAPI version > working? Any known problems with the SCSI versions? > > Greg > -- Oops, a 30GB backup for $299! I wish I've seen it before purchasing a 5BG Travan drive (HP Colorado 5GB, it's also an ATAPI tape drive)! If the ADR drive is an ATAPI drive, it would work with the "wst" driver included in FreeBSD (just recompile your kernel with a config file with the folowing lines): options ATAPI #Enable ATAPI support for IDE bus options ATAPI_STATIC #Don't do it as an LKM controller wdc1 at isa? port "IO_WD2" bio irq 15 device wst0 It works with my Colorado drive, but there are some "issues": The End Of File is seen as an I/O Error, the End of Media error is also seen as an I/O error (Which make "dump" trying again the same tape instead of asking for the folowing tape). You should also avoid sending a command (such as rewind, fsf 1, ...) when the drive execute another one: FreeBSD just freeze until the completion of the first command :( I've also some I/O error during some backup (It may be an HP specific problem)... And also some other errors where the driver is "stalled": it seems a "write" command doesn't finish: you can't kill the writing process... And you should not send any command (you would freeze FreeBSD... until ON/OFF switch :< ). Are some interupts "lost" ? That's it! One other point... you should also check if your drive support hardware compression. My Colorado 5GB doesn't... it's only sold with software which compress data. A "gzip -1" command on a Pentium 90 compress incoming data at 380 Kb/s, which make my backup bandwith quite slow compared with the 700 kb/s given by HP (on a P200). A bakup with no compression is faster, but I would need changing my 2.5GB tape. (Perhaps ADR drives handles hardware compression... Anyway, perhaps a single 15GB tape is enough for your disks). A last word... I havn't tryed the ADR tape. I can't garantee you the ADR drive would work, but ATAPI/SCSI tape drives should follow the QIC-157 norm. It's likely the ADR drive will work like my ATAPI tape... and even faster! -- Frederic Loyer <loyer@ensat.fr> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199903192053.VAA15480>