tapeinfo no shows remaining size
Brought to you by:
elgreen,
robertnelson
Menu
▾
▴
#15 tapeinfo no shows remaining size
I has write about 237Gb on to tape by GNU tar and get those tapeinfo output:
tapeinfo -f /dev/nst0
Product Type: Tape Drive
Vendor ID: 'HP '
Product ID: 'Ultrium 3-SCSI '
Revision: 'C26D'
Attached Changer API: No
SerialNumber: xxxx
MinBlock: 1
MaxBlock: 16777215
SCSI ID: 16
SCSI LUN: 0
Ready: yes
BufferedMode: yes
Medium Type: Not Loaded
Density Code: 0x44
BlockSize: 0
DataCompEnabled: yes
DataCompCapable: yes
DataDeCompEnabled: yes
CompType: 0x1
DeCompType: 0x1
Block Position: 1933551
Partition 0 Remaining Kbytes: 400308
Partition 0 Size in Kbytes: 400308
ActivePartition: 0
EarlyWarningSize: 0
NumPartitions: 0
MaxPartitions: 0
Firstly, Partition 0 Remaining Kbytes tell me that I no used any tape space. Secondly, if I try to calculate the used space using the MaxBlock and Block Position data, I get obviously wrong value: about 11.5% used. But my backup data is not well compressible - it is video and photo. mt tell give me the same thing: At block 1933551. How to estimate the used space on tape?
Originally filed as https://bugzilla.opensuse.org/show_bug.cgi?id=972954
Sorry for confusion, MaxBlock value tell about maximal block size, not about block position. My method of calculating is invalid. Close this bug please.