Tapetype definitions: Difference between revisions

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m (Reverted edit of Qolyan, changed back to last version by Paul.bijnens)
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Running [[amtapetype]] takes some time (expect 5-8 hours).  
Running [[amtapetype]] takes some time (expect 5-8 hours).  
The program will fill a scratch tape twice with random data.  
The program will fill a scratch tape twice with random data.  
When running "amtapetype" yourself be sure to add a realistic estimate option:
When running "amtapetype" yourself be sure to add a realistic estimate option:
"amtapetype -e 200g ...", otherwise, the program could take days to complete.
"amtapetype -e 200g ...", otherwise, the program could take days to complete.


Running amtapetype on your installation instead of just using the values found here,
Running amtapetype on your installation instead of just using the values found here,
allows you to verify the capacity (is hardware compression "on" by mistake?)  
allows you to verify the capacity (is hardware compression "on" by mistake?)  
and speed (is there a problem with my SCSI chain?).
and speed (is there a problem with my SCSI chain?).


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* Attached to Adaptec 2940 Fast-SCSI (10MB/s)
* Attached to Adaptec 2940 Fast-SCSI (10MB/s)
  define tapetype DLT8000 {
  define tapetype DLT8000 {
     comment "Quantum DLT8000 created by tapetype"
     comment "Quantum DLT8000 created by tapetype"
     length 38130 mbytes
     length 38130 mbytes
     filemark 29 kbytes
     filemark 29 kbytes
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* Attached to Adaptec 2940 Fast-SCSI (10MB/s)
* Attached to Adaptec 2940 Fast-SCSI (10MB/s)
  define tapetype SDLT600 {
  define tapetype SDLT600 {
     comment "Quantum SDLT600 with 10MB/s"
     comment "Quantum SDLT600 with 10MB/s"
     length 306789 mbytes
     length 306789 mbytes
     filemark 0 kbytes
     filemark 0 kbytes
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* Attached to Adaptec 19160 SCSI-160 LVD (160MB/s)
* Attached to Adaptec 19160 SCSI-160 LVD (160MB/s)
  define tapetype SDLT600 {
  define tapetype SDLT600 {
     comment "Quantum SDLT600 with SCSI-3"
     comment "Quantum SDLT600 with SCSI-3"
     length 304896 mbytes
     length 304896 mbytes
     filemark 0 kbytes
     filemark 0 kbytes
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* Attached to Adaptec 29160 Ultra160 SCSI adapter, using DLT-VS1 tape: created using 'tapetype' by [email protected]
* Attached to Adaptec 29160 Ultra160 SCSI adapter, using DLT-VS1 tape: created using 'tapetype' by [email protected]
   define tapetype Quantum-DLT-V4 {
   define tapetype Quantum-DLT-V4 {
       comment "Quantum-DLT-V4 on Adaptec 29160"
       comment "Quantum-DLT-V4 on Adaptec 29160"
       length 157284 mbytes
       length 157284 mbytes
       filemark 0 kbytes
       filemark 0 kbytes
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* Attached to Adaptec 2940 (10 MB/s)
* Attached to Adaptec 2940 (10 MB/s)
   define tapetype AIT1-35 {
   define tapetype AIT1-35 {
       comment "AIT1 cartridge 35/70 Gbyte compression off"
       comment "AIT1 cartridge 35/70 Gbyte compression off"
       length 33400 mbytes    # rounded down
       length 33400 mbytes    # rounded down
       filemark 500 kbytes
       filemark 500 kbytes
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Note: using hardware compression together with software compression does not lower the tape capacity, as many other tape drives do.
Note: using hardware compression together with software compression does not lower the tape capacity, as many other tape drives do.
   define tapetype LTO {
   define tapetype LTO {
     comment "just produced by tapetype prog (hardware compression off)"
     comment "just produced by tapetype prog (hardware compression off)"
     length 101376 mbytes
     length 101376 mbytes
     filemark 0 kbytes
     filemark 0 kbytes
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Note: using hardware compression together with software compression does not lower the tape capacity, as many other tape drives do.
Note: using hardware compression together with software compression does not lower the tape capacity, as many other tape drives do.
   define tapetype LTO2-200 {
   define tapetype LTO2-200 {
       comment "LTO Ultrium2 200/400"
       comment "LTO Ultrium2 200/400"
       length 193024 mbytes
       length 193024 mbytes
       filemark 0 kbytes
       filemark 0 kbytes
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* Attached to Adaptec 2940
* Attached to Adaptec 2940
   define tapetype DDS90 {
   define tapetype DDS90 {
       comment "DDS tapes drives - 90 meter tapes"
       comment "DDS tapes drives - 90 meter tapes"
       length 1900000 kbytes # rounded down
       length 1900000 kbytes # rounded down
       filemark 111 kbytes
       filemark 111 kbytes
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* Attached to Adaptec 2940
* Attached to Adaptec 2940
   define tapetype DDS120 {
   define tapetype DDS120 {
       comment "DDS tape drives - 120 meter tapes"
       comment "DDS tape drives - 120 meter tapes"
       length 3850000  # rounded down
       length 3850000  # rounded down
       filemark 111 kbytes
       filemark 111 kbytes
       speed 380 kps
       speed 380 kps
}
}
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Revision as of 04:57, 14 December 2005

Running amtapetype takes some time (expect 5-8 hours). The program will fill a scratch tape twice with random data. When running "amtapetype" yourself be sure to add a realistic estimate option: "amtapetype -e 200g ...", otherwise, the program could take days to complete.

Running amtapetype on your installation instead of just using the values found here, allows you to verify the capacity (is hardware compression "on" by mistake?) and speed (is there a problem with my SCSI chain?).

Not all tapes have exactly the same length, therefor some length values have been rounded down, as noted in the entries. This allows Amanda to do better planning, because you waste a lot of capacity when the last few bytes of a multi-gigabyte dump do not fit on the tape.


Quantum DLT8000

  • Attached to Adaptec 2940 Fast-SCSI (10MB/s)
define tapetype DLT8000 {
    comment "Quantum DLT8000 created by tapetype"
    length 38130 mbytes
    filemark 29 kbytes
    speed 5627 kps
}

Quantum SDLT600

  • Attached to Adaptec 2940 Fast-SCSI (10MB/s)
define tapetype SDLT600 {
    comment "Quantum SDLT600 with 10MB/s"
    length 306789 mbytes
    filemark 0 kbytes
    speed 8247 kps
}
  • Attached to Adaptec 19160 SCSI-160 LVD (160MB/s)
define tapetype SDLT600 {
    comment "Quantum SDLT600 with SCSI-3"
    length 304896 mbytes
    filemark 0 kbytes
    speed 31703 kps
}

Quantum DLT-V4

  • Attached to Adaptec 29160 Ultra160 SCSI adapter, using DLT-VS1 tape: created using 'tapetype' by [email protected]
 define tapetype Quantum-DLT-V4 {
     comment "Quantum-DLT-V4 on Adaptec 29160"
     length 157284 mbytes
     filemark 0 kbytes
     speed 9936 kps
 }

Sony AIT-1 with 35/70 Gbyte tapes

  • Attached to Adaptec 2940 (10 MB/s)
 define tapetype AIT1-35 {
     comment "AIT1 cartridge 35/70 Gbyte compression off"
     length 33400 mbytes    # rounded down
     filemark 500 kbytes
     speed 2890 kps
 }

LTO Ultrium 1 with 100/200 Gbyte tapes

  • Attached to Adaptec 39160

Note: using hardware compression together with software compression does not lower the tape capacity, as many other tape drives do. 

 define tapetype LTO {
   comment "just produced by tapetype prog (hardware compression off)"
   length 101376 mbytes
   filemark 0 kbytes
   speed 13872 kps
 }

HP448 (LTO Ultrium2) with 200/400 Gbyte tapes

  • Attached to Adaptec 29160 (160 MB/s)

Note: using hardware compression together with software compression does not lower the tape capacity, as many other tape drives do. 

 define tapetype LTO2-200 {
     comment "LTO Ultrium2 200/400"
     length 193024 mbytes
     filemark 0 kbytes
     speed 20570 kps
 }

DDS-2 90 meter tapes

  • Attached to Adaptec 2940
 define tapetype DDS90 {
     comment "DDS tapes drives - 90 meter tapes"
     length 1900000 kbytes # rounded down
     filemark 111 kbytes
     speed 380 kps
 }

DDS-2 120 meter tapes

  • Attached to Adaptec 2940
 define tapetype DDS120 {
     comment "DDS tape drives - 120 meter tapes"
     length 3850000  # rounded down
     filemark 111 kbytes
     speed 380 kps

}

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