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BLKRASET：设备的不适当的ioctl

[英]BLKRASET: Inappropriate ioctl for device

原文 2013-05-22 20:48:03 2 1 linux/ mongodb

I'm receiving this error 我收到此错误

BLKRASET: Inappropriate ioctl for device BLKRASET：设备的不适当的ioctl

when trying to run 尝试跑步时

sudo blockdev --setra 256 /data sudo blockdev --setra 256 /数据

on my Linux server. 在我的Linux服务器上。 The server is being used as a MongoDB server and /data is where it stores it's data. 该服务器被用作MongoDB服务器，/ data是其存储数据的位置。

I initially tried to run this command when I received this warning when starting my MongoDB shell: 启动MongoDB Shell时收到以下警告时，我最初尝试运行此命令：

Wed Mar 20 22:40:49.850 [initandlisten] 3月20日，星期三22：40：49.850 [initandlisten]

Wed Mar 20 22:40:49.850 [initandlisten] ** WARNING: Readahead for /data/db is set to 2048KB 周三3月20日22：40：49.850 [initandlisten] **警告：/ data / db的预读设置为2048KB

Wed Mar 20 22:40:49.850 [initandlisten] ** We suggest setting it to 256KB (512 sectors) or less Wed Mar 20 22：40：49.850 [initandlisten] **我们建议将其设置为256KB（512个扇区）或更小

Wed Mar 20 22:40:49.850 [initandlisten] ** http://dochub.mongodb.org/core/readahead 3月20日，星期三22：40：49.850 [initandlisten] ** http://dochub.mongodb.org/core/readahead

The blockdev --setra command is supposed to set the readahead value for that directory and resolve the issue but I'm running into this issue blockdev --setra命令应该为该目录设置预读值并解决问题，但是我遇到了这个问题

1 个解决方案

The blockdev command operates on block devices (disks), not directories. blockdev命令在块设备（磁盘）上而非目录上运行。 You need to pass it the name of the device in /dev/ where your data directory is stored. 您需要在存储数据目录的/dev/中将设备的名称传递给它。 If you df /data it will tell you which device is currently mounted there. 如果您使用df /data ，它将告诉您当前在那安装了哪个设备。 Then you can run blockdev --setra 512 /dev/whatever 然后您可以运行blockdev --setra 512 /dev/whatever