Dotaz: zjisteni stavu zalohovaci mechaniky

[marcelius]

Zdravim vas, mam zalohovaciu mechaniku HP Ultrium 2-SCSI, T61D. Pri pouziti tapeinfo -f /dev/sg1 mi vypise stav mechaniky. Zaujima ma tato hlaska:

Medium Type: Not Loaded

Neviete co presne to znamena? Paska je urcite v mechanike a je ok. Na google som nic konkretne nevygooglil..

Vdaka.

Odpovědi

[Fuky]

Mrkni viz níže, podle mě to znamená, že SCSI příkaz nevrátil informaci o Medium Type.

tapeinfo.c

521     if (SCSI_ExecuteCommand(fd, Input, &CDB, 6, input_buffer, 255, RequestSense) != 0)
522     {
523 #ifdef DEBUG_MODE_SENSE
524         fprintf(stderr,"Could not execute mode sense...\n");
525         fflush(stderr);
526 #endif
527         return NULL; /* sorry, couldn't do it. */
528     }
529
530     /* Oh hell, write protect is the only thing I have: always print
531      * it if our mode page was 0x0fh, before skipping past buffer:
532      * if the media is *NOT* write protected, just skip, sigh.
533      *
534      * Oh poops, the blocksize is reported in the block descriptor header
535      * <   * too. Again, just print if our mode page was 0x0f...
536      */
537     if (pagenum == 0x0f)
538     {
539         int blocklen;
540
541         if (input_buffer[2] & 0x80)
542         {
543             printf("WriteProtect: yes\n");
544         }
545
546         if (input_buffer[2] & 0x70)
547         {
548             printf("BufferedMode: yes\n");
549         }
550
551         if (input_buffer[1] )
552         {
553             printf("Medium Type: 0x%x\n", input_buffer[1]);
554         }
555         else
556         {
557             printf("Medium Type: Not Loaded\n");
558         }

[marcelius]

jo, podla toho to tak vyzera, ale netusim preco to neberie?

[Peter Golis]

Mne sa obvykle mechaniky hlasia na /dev/st* . Tebe nie?

[marcelius]

ja som tiez bol v tom ze to bude /dev/stx ,ale system mi to nasiel ako /dev/sg1, je HP Proliant ML370G6 server, je tam Centos 5.3/64

[marcelius]

Dalsia zaujimava vec: mt -f /dev/nst0 status (pricom paska je /dev/sg1) SCSI 2 tape drive: File number=1, block number=-1, partition=0. Tape block size 0 bytes. Density code 0x42 (LTO-2). Soft error count since last status=0 General status bits on (9010000): EOD ONLINE IM_REP_EN

pri pretoceni pasky hlasi: mt rewind /dev/tape: Inappropriate ioctl for device

Ulozenie dat na pasku: tar -cvf /dev/nst0 /a tar: Removing leading `/' from member names /a/ /a/check_ups_bcapacity.sh /a/check_ups_timerem.sh

citanie nejde, netusim preco: tar -tvf /dev/nst0 tar: /dev/nst0: Cannot read: Input/output error tar: At beginning of tape, quitting now tar: Error is not recoverable: exiting now

Preco sa v systeme paska hlasi ako /dev/sg1 a cez mt /dev/nst0 ??? Preco pri citani pasky hlasi Cannot read: Input/output error ???

Vie niekto v tomto poradit? Vdaka.

[R]

"mt rewind /dev/tape" - co je /dev/tape?

Ak chces precitat, co si zapisal tym tarom, tak musis pasku pretocit na zaciatok!

[marcelius]

"mt rewind /dev/tape" - co je /dev/tape?

Ak chces precitat, co si zapisal tym tarom, tak musis pasku pretocit na zaciatok!

To malo ist na dalsi riadok. Malo to byt: "mt rewind" A /dev/tape ... bol vysledok

[R]

1) Zisti si, kde mas pasku. Pravdepodobne /dev/st0.

2) Pouzi "mt -f /dev/st0 rewind". mt implicitne pracuje s cestou /dev/tape (ktora je pravdepodobne adresar).

[R]

A neplet dokopy paskove zariadenia (nst, st) so SCSI Generic (sg).

[marcelius]

Asi sa blbo pytam, ale ako vycitat data z danej pasky, ked som pouzil (tar -cvf /dev/nst0 /a) pricom paska je /dev/sg0 ???

Vdaka za odpoved.

[Ivan]

sgX - SCSI generic device. Toto zarizeni existuje pro kazde SCSI zarizeni(disk, paska, scanner, cdrom). Pokud pouzivas toto zarizeni komunikujes primo se ovladacem SCSI radice(vice-mene). stX- je SCSI paska. V tomto pripade komunikujes na vyssi urovni s ovladacem "mt", ktery pak posila sam SCSI prikazy ma sg.

Pokud chces precist data tar-em, tak bys' mel nejdrive tu pasku pretocit na zacatek. (mt rewind).