Date: Thu, 19 May 2005 17:07:43 -0300 From: =?ISO-8859-1?Q?Tulio_Guimar=E3es_da_Silva?= <tuliogs@pgt.mpt.gov.br> To: freebsd-hardware@freebsd.org Subject: Weird behaviour of AIT-3 and (g)tar Message-ID: <428CF20F.50607@pgt.mpt.gov.br>
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--------------040402030900010300010508 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mail.pgt.mpt.gov.br id j4JK7kjd041873 Hello again, I=B4m having some trouble putting a Sony SDX-700V SCSI AIT-3 unit to=20 work on FreeBSD 5.3-RELEASE. The first issue is: it runs toooooooo slow. Transfers with tar=20 (whithout -j, -z and such) or "cat file >/dev/sa0" go at about 800kB/s,=20 though it should be more than 10MB/s. This wouldn=B4t be a big issue, but= =20 then comes the second problem... Besides the speed, hardware compression seems to not being funcional=20 either. I already tried every 4 possible dip switch setting for=20 compression, but I am still not able to transfer a 180GB archive to a=20 (should-be) 260GB medium. And when I thought I could live with that... Third problem: tar does not (re)store all files, specially when I set=20 block ("-b") sizes. With -b 64 and upper, tar would end perfectly and=20 fast, but when trying to restore or list it ends prematurely; i=B4m now=20 trying to test with -b 10, but it=B4s already taking more than 20 hours t= o=20 complete the transfer, and I don=B4t know if it will end before this=20 weekend. :) There=B4s no change if I use tar or gtar. :( Now for the environment: HP ML 110 server, 2.8 GHz HT (enabled) 4x80GB SATA disks in RAID5 on a HighPoint Rocket Raid 1820A Adaptec 2940UW or Ultra160, doesn=B4t matter... I think i=B4m using correct cabling :) ; with the 2940UW I use a=20 standard flat-68 and termination on the device, or, the Ultra160 goes=20 with a terminated 2-device twisted flat cable on the card=B4s LVD=20 connector (not the SE). That=B4s what we use for other SCSI machines too. Is there any known issue with AIT-3 tapes? Am I missing or doing=20 something wrong? Should I change to another backup software? Well, thanks again for your attention. Ideas are *very* welcome. Tulio --------------040402030900010300010508--
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