Michael, On 2018/08/22 12:05, Michael Kelley (EOSG) wrote: > One more question: What's the preferred source for the zbc_* commands? > I built from https://github.com/hgst/libzbc, but get this runtime failure: > > root@MHKfio2:~# zbc_report_zones /dev/nullb0 > Device /dev/nullb0: > Vendor ID: FAKE HGST HM libzbc > Emulated zoned block device interface, Host-managed zone model The above line says "emulated" which means that libzbc detected a regular block device and went into emulation mode. This means that your null_blk setup is not supporting zoned mode or nullb0 was not created as a zoned device. You can easily check if the nullb device created is zoned or not: just look into /sys/block/nullb0/queue/zoned. It should say "host-managed". In your case, the content is probably "none". > 2097152 512-bytes sectors > 262144 logical blocks of 4096 B > 262144 physical blocks of 4096 B > 1.074 GB capacity > Read commands are restricted > Maximum number of open sequential write required zones: 32 > zbc_report_nr_zones at 0, ro 0x00 failed -6 > > Michael > On another note, you can also use the sysutils blkzone command to do the same: blkzone report /dev/nullb0 will five you the zone list. Best regards. -- Damien Le Moal Western Digital Research
