Comment 4 for bug 1650300

Dimitri John Ledkov (xnox) wrote :

Please excuse my ignorance, but I am working under the assumption that FBA devices should be partitioned using DASD partitioning table just like the ECKD drives (using fdasd tool). If this is wrong, and e.g. ms-dos partition table should be used for FBA devices, we need to change the logic that decides which partitioning tables to use in the installer.

I can reproduce this bug, in a sense that kernel manages to read DASD partitioning table, and partitions, off FBA device including volume label, yet userspace tools parted and fdasd cannot.

Jan 11 07:07:27 kernel: [ 156.679393] dasd-fba 0.0.0104: New FBA DASD 9336/10 (CU 6310/80) with 59025 MB and 512 B/blk
Jan 11 07:07:27 kernel: [ 156.682792] dasdb:VOL1/ 0X0104: dasdb1 dasdb2

# cat /proc/dasd/devices
0.0.0104(FBA ) at ( 94: 4) is dasdb : active at blocksize: 512, 120884827 blocks, 59025 MB

# cat /proc/partitions | grep dasdb
  94 4 60442413 dasdb
  94 5 585920 dasdb1
  94 6 59856256 dasdb2

# fdasd -p /dev/dasdb

fdasd error: Unsupported disk type
/dev/dasdb is not an ECKD disk! This disk type is not supported!

# fdasd -f -p /dev/dasdb
reading volume label ..:
Cannot show requested information because the disk label block is invalid

# parted /dev/dasdb print
Model: IBM S390 DASD drive (dasd)
Disk /dev/dasdb: 61.9GB
Sector size (logical/physical): 512B/512B
Partition Table: dasd
Disk Flags:

Number Start End Size File system Flags
 1 1024B 61.9GB 61.9GB