When creating a zpool on a certain usb flash disk, I keep getting kernel messages: (da0:umass-sim0:0:0:0): SYNCHRONIZE CACHE. CDB: 35 0 0 0 0 0 0 0 0 0 (da0:umass-sim0:0:0:0): CAM Status: SCSI Status Error (da0:umass-sim0:0:0:0): SCSI Status: Check Condition (da0:umass-sim0:0:0:0): ILLEGAL REQUEST asc:20,0 (da0:umass-sim0:0:0:0): Invalid command operation code (da0:umass-sim0:0:0:0): Unretryable error However, the zpool and file system on it seem to work as expected. I can't reproduce the problem with another (more recent) usb flash drive. Below are the (verbose) dmesg output for the usb keys. umass0: <vendor 0x0930 USB Flash Memory, class 0/0, rev 2.00/1.00, addr 2> on uhub5 umass0:0:0:-1: Attached to scbus0 umass1: <USB DISK 2.0, class 0/0, rev 2.00/12.19, addr 3> on uhub5 umass1:1:1:-1: Attached to scbus1 da0 at umass-sim0 bus 0 target 0 lun 0 da0: < USB Flash Memory 1.00> Removable Direct Access SCSI-2 device da0: Serial Number \^_ da0: 40.000MB/s transfers da0: 1930MB (3953664 512 byte sectors: 255H 63S/T 246C) da1 at umass-sim1 bus 1 target 0 lun 0 da1: <USB DISK 2.0 1219> Removable Direct Access SCSI-0 device da1: Serial Number \^_ da1: 40.000MB/s transfers da1: 1912MB (3915776 512 byte sectors: 255H 63S/T 243C) How-To-Repeat: Plug a certain type (?) of usb key. Enter the following : zfs create testusb /dev/da0
Responsible Changed From-To: freebsd-bugs->pjd Hi Pawel, can you help sorting this out please?
Responsible Changed From-To: pjd->freebsd-fs With pjd's permission, reassing ZFS-related PRs to freebsd-fs.
State Changed From-To: open->closed This isn't a zfs issue. Many USB keys need a quirk indicating the non-availability of "SYNCHRONIZE CACHE".