Date: Thu, 16 May 2013 16:51:34 -0400 From: Zaphod Beeblebrox <zbeeble@gmail.com> To: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: tape (sa0) on sparc64 ? Message-ID: <CACpH0Mcass3ONxhFw5mRrQ1K931gxaxBZgo45_%2BynLrrbm4DUw@mail.gmail.com>
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I have to retrieve some very old backups. They were made on FreeBSD and are on tape... specifically DDS4. I have a DDS4 drive and I ordered cables that hook it up to my sparc64. For fun and giggles I have both the motherboard controller... sym0: <1010-66> port 0x900-0x9ff mem 0x100000-0x1003ff,0x102000-0x103fff at device 2.0 on pci2 sym0: No NVRAM, ID 7, Fast-80, LVD, parity checking sym1: <1010-66> port 0xa00-0xaff mem 0x104000-0x1043ff,0x106000-0x107fff at device 2.1 on pci2 sym1: No NVRAM, ID 7, Fast-80, LVD, parity checking and an adaptec controller ahc0: <Adaptec 3960D Ultra160 SCSI adapter> port 0x300-0x3ff mem 0x100000-0x100fff at device 1.0 on pci3 aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs ahc1: <Adaptec 3960D Ultra160 SCSI adapter> port 0x400-0x4ff mem 0x102000-0x102fff at device 1.1 on pci3 aic7899: Ultra160 Wide Channel B, SCSI Id=7, 32/253 SCBs in the box. The tape drive is terminated with an external terminator (which seems proper since I found it in my collection with that terminator still attached). I have tried the tape connected to both the internal and adaptec controllers. Right now it shows up as: sa0 at sym1 bus 0 scbus3 target 2 lun 0 sa0: <HP C5683A C908> Removable Sequential Access SCSI-2 device sa0: 40.000MB/s transfers (20.000MHz, offset 31, 16bit) [1:24:324]root@run:/home/foo> mt stat Mode Density Blocksize bpi Compression Current: 0x26:DDS-4 variable 97000 DCLZ ---------available modes--------- 0: 0x26:DDS-4 variable 97000 DCLZ 1: 0x26:DDS-4 variable 97000 DCLZ 2: 0x26:DDS-4 variable 97000 DCLZ 3: 0x26:DDS-4 variable 97000 DCLZ --------------------------------- Current Driver State: at rest. --------------------------------- File Number: 0 Record Number: 0 Residual Count 0 However, attached to either controller (after a reboot of the machine and a powercycle of the drive), I get: [1:25:325]root@run:/home/foo> dd if=/dev/sa0 of=tape5 dd: /dev/sa0: Input/output error 0+0 records in 0+0 records out 0 bytes transferred in 0.002930 secs (0 bytes/sec) ... which is a return code of '1' and no messages on the console... I have, before you ask, tried "bs=10k" and 20k ... but I believe this command should run by itself fetching the first 512 bytes of each block --- narrowing down the block size logically comes after making the tape go. (in case it matters, the machine is FreeBSD run.dclg.ca 9.1-STABLE FreeBSD 9.1-STABLE #1 r250082: Mon Apr 29 20:54:58 EDT 2013 root@run.dclg.ca:/usr/obj/usr/src/sys/GENERIC sparc64
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