我試圖用虛擬機創建一個dm-cache設備。我有一個標Cache_disk,Device_to_Cache和meta_data多個磁盤中的/ dev/sdb的,SDC,SDD分別,當試圖創建緩存,我運行命令:使用dmsetup創建dm-cache內核3.9.6
dmsetup create my_cache --table '0 16775168 cache /dev/sdd1 /dev/sdb1 /dev/sdc1 512 1 writeback default 0'
的指示在DM緩存文章文檔page
我已啓用內核DM-緩存,但我抓住這個錯誤:
device-mapper: reload ioctl failed: Invalid or incomplete multibyte or wide character
command failed
當在dmesg的設備映射尋找:高速緩存元數據無法實現其sb_check
[email protected]:/home/msali014# dmesg
[ 5432.738603] device-mapper: cache-policy-mq: version 1.0.0 loaded
[ 5432.794852] device-mapper: cache metadata: sb_check failed: magic 0: wanted 1623043
[ 5432.794862] device-mapper: block manager: superblock validator check failed for block 0
[ 5432.794867] device-mapper: cache metadata: couldn't read lock superblock
[ 5432.797952] device-mapper: table: 252:0: cache: Error creating metadata object
在/ var/log/syslog的是相似的:
Jun 28 11:17:01 msali014-VirtualBox CRON[2935]: (root) CMD ( cd/&& run-parts --report /etc/cron.hourly)
Jun 28 11:33:08 msali014-VirtualBox kernel: [ 5432.738603] device-mapper: cache-policy-mq: version 1.0.0 loaded
Jun 28 11:33:08 msali014-VirtualBox kernel: [ 5432.794852] device-mapper: cache metadata: sb_check failed: magic 0: wanted 1623043
Jun 28 11:33:08 msali014-VirtualBox kernel: [ 5432.794862] device-mapper: block manager: superblock validator check failed for block 0
Jun 28 11:33:08 msali014-VirtualBox kernel: [ 5432.794867] device-mapper: cache metadata: couldn't read lock superblock
Jun 28 11:33:08 msali014-VirtualBox kernel: [ 5432.797952] device-mapper: table: 252:0: cache: Error creating metadata object
Jun 28 11:33:08 msali014-VirtualBox kernel: [ 5432.797960] device-mapper: ioctl: error adding target to table
Jun 28 11:33:08 msali014-VirtualBox udevd[619]: inotify_add_watch(6, /dev/dm-0, 10) failed: No such file or directory
Jun 28 11:33:08 msali014-VirtualBox udevd[619]: inotify_add_watch(6, /dev/dm-0, 10) failed: No such file or directory
[ 5432.797960] device-mapper: ioctl: error adding target to table
我怎樣才能改變的SB->魔法值,使DM-緩存加載成功?任何幫助將不勝感激。
由於我沒有完全理解表格並給它一些垃圾輸入,所以多字節看起來像是一個傘狀的錯誤信息,我創建了新的驅動器,但沒有創建ssd-metadata或塊,但是這樣做後,爲家用緩存設備獲得正確的偏移量,它非常棒!感謝您所有的幫助。 – thisismario123
很高興你能工作。沒有理由你的專用分區或專用設備不應該工作。長期來說,我可能會使用lvm2來管理我的dm線性區域,而不是自己管理它們。 – Kyle