Is it an 'old' LTO1(HCART) tape maybe & all your drives are now LTO3 (HCART3)?

I also had the "Unrecognised J-string" error which I also posted here. Will have a look & post the link here when I find it!

***EDIT**

Here's the post I mentioned about the "unrecognised J-string" (it's a bug):
https://www-secure.symantec.com/connect/forums/error-reported-restore

in which CRZ kindly notified the relevant T/N:
BUG REPORT: During a restore, warnings from bpbrm may be displayed which include a substring similar to "Unrecognized -J string spsrestoreoptions=0." These messages are spurious and may safely be ignored.

All drives are LTO4

Tape density = HCART
the drive is a SUN - SL24  - LTO4 - HCART3

Can a HCART3 drive read a HCART tape?

Thanks a lot for your help

I'm was trying to colect info about the drives.

and I got in   Media and Device manager,  device , drives ,      -    "cannot connetc on socket"  after a refresh apears ok..

Thanks about the link.. 

I'm getting that error too, the problem is .. the backup won't  restore.

apears an status 5 like my drives were down or something.

your fists question is Right.. the tape is a HCART and the drive is a LTO4 HCART3.
something I shoud do about it?

WOW..

I think that is close to the end

should I chance the drive dencity to HCART restore and back to HCART3 ??

Thank you Andy,

I hope some day I help you too.

Thanks a lot

The restore is Running. now..

Environment: - Solaris10 with Netbackup 6.5.5

Backed up Environment: - a 3 tier architecture, 1 Master Server with 2 media servers connected to 2 tape libraries.

Restoring in to single Sun server (same version solaris & netbackup) acting as master/media server connected to a IBM Standalone LTO3 tape drive.

Catalog restored successfully;
Deleted all devices before trying to restore data (hosts/storage units/robots/drives etc)
Configured storage unit/drive, updated new volume and tested backup successfully;

However while trying to restore data from the tapes those were backed up in the 3 tier env. failing with with following error

Error: bptm NBJM returned an extended error status; drives unavailable or down (830)
           the restore failed to recover the requested files (5)

Error nbjm (pid=xxxx) NBU status:830, EMM status; No drives are available

Any idea how to go about it?

Thanks in advance for your suggestions.