<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <meta name="Generator" content="Microsoft Exchange Server">  <style></style> </head> <body> <font face="Calibri" size="2"><span style="font-size:11pt;"> <div>Hi, all:</div> <div> </div> <div style="text-indent:9.6pt;">I use device mapper to config a thin-provision for a block device, with dmsetup, with the following command:</div> <div style="text-indent:9.6pt;"> </div> <div style="text-indent:9.6pt;">Dmsetup create pool –table “0 `blockdev –getsize /dev/sdd1` thin-pool /dev/sdd2 /dev/sdd1 128 0”</div> <div style="text-indent:9.6pt;">Dmsetup message /dev/mapper/pool 0 “create_thin 0”</div> <div style="text-indent:9.6pt;">Dmsetup create snap1 –tabe “0 `blockdev –getsize /dev/sdd3` thin /dev/mapper/pool 0 /dev/sdd3”</div> <div style="text-indent:9.6pt;"> </div> <div style="text-indent:9.6pt;">Everything works well, but when I reboot the system, the block device is gone, I need to create the pool again…</div> <div style="text-indent:9.6pt;"> </div> <div style="text-indent:9.6pt;">Anyone has idea on how to make this config persistent? I need to boot the kernel , the dm pool device shows after the MD device found.</div> <div><font face="Times New Roman"> </font></div> <div>Thanks,</div> <div>Xun </div> <div><font face="Times New Roman"> </font></div> </span></font> </body> </html>