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Need to understand relation between HCART and LTOin NBU ..anybody pls ?

nbuno
Level 6
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Nicolai
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The different HCART's as just a definition or labels. There is no rule that define HCART?? must match to a specific generation of LTO drive. That also why there is no HCART5 definition to match LTO5 - there is no need to.

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AmolB
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Nicolai
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The different HCART's as just a definition or labels. There is no rule that define HCART?? must match to a specific generation of LTO drive. That also why there is no HCART5 definition to match LTO5 - there is no need to.

mph999
Level 6
Employee Accredited

There is no relation between hcart and LTO.

You could set the drives as 4mm, they will work exactly the same way.

NBU uses 'density' to allow only the tapes that have the same density as the drive to be loaded.

It is much easier to think of colours.

hcart = green

hcart2 = red

4mm = blue

If I set the density of my tapes to red, and set the density of my drives to red, then the tapes are allowed to be used by NBU in those drives.

Of course, in NBU, we do not see the density called red, we see hcart2 (for example)

We could the change the 'density' of the drives to 'blue' (or really 4mm) and then the tapes will not be loaded, as they are set to a different density.

If we then change the tapes to blue (or really 4mm) - it will all work again.

It is that simple, chaging the density of a tape of drive has no effect on it's performance, or capacity.

It would have been much easier if Netbackup had been written to use colours instead of names, blue tape goes in a blue drive for example.

Martin

nbuno
Level 6

what HCART means ? and is it true that after LTO3 every media label would be HCART only ..i mean i never saw HCART4 ?

 

Thanks !!

nbuno
Level 6

so is there a way we can see in NBU what is the density of tape it is using ?

i mean i have seen HCART + HCART2 working just fine in an environment..

 

thanks guys for quick response..

 

mph999
Level 6
Employee Accredited

hcart stands for 'half inch tape cartridge' but it doesn't really mean anything, as I explained above.

I don't think there is an hcart4

You can see the drive density with tpconfig -d

You can see the tape density with vmquery -m <media id>

(Both commands are in the .../volmgr/bin dir )

Martin

 

Nicolai
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Once HCART, HCART2 and HCART3 are used you start over again with HCART.

As said before this is just a density label that help Netbackup differentiate different tape types.

 

Marianne
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NBU defaults can be found in external_types.txt (in /usr/openv/var/global).

Example ( HCART1 shows up as HCART) : 

 

[DRIVE:NetBackup HCART1]
TECHNOLOGY_GROUP=NetBackup HCART
INQUIRY=FUJITSU M2488
INQUIRY=FUJITSU M8100
INQUIRY=IBM     03490C2A03490C2A17
INQUIRY=STK     4490
INQUIRY=STK     4890
INQUIRY=STK     9490
INQUIRY=HP      Ultrium 1
INQUIRY=HP      Ultrium 4
INQUIRY=IBM     ULT3580-TD1
INQUIRY=IBM     ULT3580-TD4
INQUIRY=IBM     ULT3580-HH4
INQUIRY=IBM     ULTRIUM-TD1
INQUIRY=IBM     ULTRIUM-TD4
INQUIRY=IBM     ULTRIUM-HH4
INQUIRY=QUANTUM ULTRIUM 4
....
...
[DRIVE:NetBackup HCART2]
TECHNOLOGY_GROUP=NetBackup HCART
INQUIRY=STK     SD-3
INQUIRY=HP      Ultrium 2
INQUIRY=HP      Ultrium 5
INQUIRY=IBM     03592
INQUIRY=IBM     ULT3580-TD2
INQUIRY=IBM     ULT3580-TD5
INQUIRY=IBM     ULT3580-HH5
INQUIRY=IBM     ULTRIUM-TD2
INQUIRY=IBM     ULTRIUM-TD5
INQUIRY=IBM     ULTRIUM-HH5
INQUIRY=CERTANCEULTRIUM 2
INQUIRY=SONY    SDZ-200
INQUIRY=QUANTUM ULTRIUM 5
INQUIRY=TANDBERGLTO-5 HH
INQUIRY=SONY    SDZ-230
INQUIRY=STK     T9940A
INQUIRY=STK     T9940B
INQUIRY=STK     T9840D
....
 
[DRIVE:NetBackup HCART3]
TECHNOLOGY_GROUP=NetBackup HCART
INQUIRY=STK     T9840C
INQUIRY=IBM     ULT3580-TD3
INQUIRY=IBM     ULT3580-HH3
INQUIRY=IBM     ULTRIUM-TD3
INQUIRY=IBM     ULTRIUM-HH3
INQUIRY=CERTANCEULTRIUM 3
INQUIRY=QUANTUM ULTRIUM 3
INQUIRY=TANDBERGLTO-3 HH
INQUIRY=HP      Ultrium 3
INQUIRY=STK     T10000A
INQUIRY=STK     T10000C