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#! /bin/sh
strace -e pread64 zdb -l /dev/sdl >/dev/null
pread64(5, "\0\1\0\0\0\0\0\0\1\0\0\0000\0\0\0\7\0\0\0\1\0\0\0\23\0\0\0doze"..., 13920, 0) = 13920
pread64(5, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 262144, 0) = 262144
pread64(5, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 262144, 262144) = 262144
pread64(5, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 262144, 16000900136960) = 262144
pread64(5, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 262144, 16000900399104) = 262144
+++ exited with 2 +++
[root@fs01 etc]# for f in 0 262144 16000900136960 16000900399104; do dd if=/dev/zero of=/dev/sdl bs=1 seek=$f count=262144; done
[root@fs01 etc]# for f in 0 262144 4000785367040 4000785629184; do dd if=/dev/zero of=/dev/disk/by-id/ata-WDC_WD40EFZX-68AWUN0_WD-WX92DA0798JN-part2 bs=1 seek=$f count=262144; done
262144+0 records in
262144+0 records out
262144 bytes (262 kB, 256 KiB) copied, 0.507745 s, 516 kB/s
262144+0 records in
262144+0 records out
262144 bytes (262 kB, 256 KiB) copied, 0.508549 s, 515 kB/s
262144+0 records in
262144+0 records out
262144 bytes (262 kB, 256 KiB) copied, 0.499234 s, 525 kB/s
262144+0 records in
262144+0 records out
262144 bytes (262 kB, 256 KiB) copied, 0.496669 s, 528 kB/s
[root@fs01 etc]# partprobe /dev/sdl
### LSBLK shows sdl has no partitions, so far so good
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