Package: flashbench Version: 62-1+b1 I tried the following commands on a 2GB usbstick:
flashbench /dev/disk/by-label/usbstklb flashbench -f /dev/disk/by-label/usbstklb flashbench -O /dev/disk/by-label/usbstklb all of which should have been harmless, but the first 0x1800000 bytes at least of the first partition were overwritten, destroying the file system on the usbstick. >From dmesg when that usb drive is hotplugged:- Direct-Access Flash Drive SM 2.0 3000 PQ: 0 ANSI: 0 CCS sd 6:0:0:0: Attached scsi generic sg2 type 0 sd 6:0:0:0: [sdb] 4021248 512-byte logical blocks: (2.06 GB/1.92 GiB) sd 6:0:0:0: [sdb] Write Protect is off sd 6:0:0:0: [sdb] Mode Sense: 43 00 00 00 sd 6:0:0:0: [sdb] No Caching mode page found sd 6:0:0:0: [sdb] Assuming drive cache: write through sdb: sdb1 sd 6:0:0:0: [sdb] Attached SCSI removable disk #fdisk: Disk /dev/sdb: 1.9 GiB, 2058878976 bytes, 4021248 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xc3072e18 Device Boot Start End Sectors Size Id Type /dev/sdb1 32 4015999 4015968 1.9G c W95 FAT32 (LBA) So flashbench seems very dangerous, and needs to ask for confirmation before modifying the contents of a drive. The very sparse documentation does not help. This is on current debian testing: # uname -a Linux machine 4.9.0-2-amd64 #1 SMP Debian 4.9.13-1 (2017-02-27) x86_64 GNU/Linux I have purged flashbench from my system as it is just too dangerous.
