1*89ac1400Sdoubled.. SPDX-License-Identifier: GPL-2.0 2*89ac1400Sdoubled.. include:: ../disclaimer-zh_CN.rst 3*89ac1400Sdoubled 4*89ac1400Sdoubled:Original: Documentation/scsi/sd-parameters.rst 5*89ac1400Sdoubled 6*89ac1400Sdoubled:翻译: 7*89ac1400Sdoubled 8*89ac1400Sdoubled 郝栋栋 doubled <doubled@leap-io-kernel.com> 9*89ac1400Sdoubled 10*89ac1400Sdoubled:校译: 11*89ac1400Sdoubled 12*89ac1400Sdoubled 13*89ac1400Sdoubled 14*89ac1400Sdoubled============================ 15*89ac1400SdoubledLinux SCSI磁盘驱动（sd）参数 16*89ac1400Sdoubled============================ 17*89ac1400Sdoubled 18*89ac1400Sdoubled缓存类型（读/写） 19*89ac1400Sdoubled------------------ 20*89ac1400Sdoubled启用/禁用驱动器读写缓存。 21*89ac1400Sdoubled 22*89ac1400Sdoubled=========================== ===== ===== ======= ======= 23*89ac1400Sdoubled 缓存类型字符串 WCE RCD 写缓存 读缓存 24*89ac1400Sdoubled=========================== ===== ===== ======= ======= 25*89ac1400Sdoubled write through 0 0 关闭 开启 26*89ac1400Sdoubled none 0 1 关闭 关闭 27*89ac1400Sdoubled write back 1 0 开启 开启 28*89ac1400Sdoubled write back, no read (daft) 1 1 开启 关闭 29*89ac1400Sdoubled=========================== ===== ===== ======= ======= 30*89ac1400Sdoubled 31*89ac1400Sdoubled将缓存类型设置为“write back”并将该设置保存到驱动器:: 32*89ac1400Sdoubled 33*89ac1400Sdoubled # echo "write back" > cache_type 34*89ac1400Sdoubled 35*89ac1400Sdoubled如果要修改缓存模式但不使更改持久化，可在缓存类型字符串前 36*89ac1400Sdoubled添加“temporary ”。例如:: 37*89ac1400Sdoubled 38*89ac1400Sdoubled # echo "temporary write back" > cache_type 39