dscheck(vn2): bio_offset 262143 is not on a sector boundary (ssize 512)
panic: assertion "error == 0" failed in hammer_ioc_volume_add at /usr/src/sys/vfs/hammer/hammer_volume.c:118
cpuid = 0
Trace beginning at frame 0xfffff801185fac48
hammer_ioc_volume_add() at hammer_ioc_volume_add+0x5c6 0xffffffff80930806 
hammer_ioc_volume_add() at hammer_ioc_volume_add+0x5c6 0xffffffff80930806 
hammer_ioctl() at hammer_ioctl+0xf0a 0xffffffff8093ed1a 
hammer_vop_ioctl() at hammer_vop_ioctl+0x48 0xffffffff80958978 
vop_ioctl() at vop_ioctl+0x63 0xffffffff8070a793 
vn_ioctl() at vn_ioctl+0xb1 0xffffffff807080e1 
Debugger("panic")

CPU0 stopping CPUs: 0x0000003e
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>