红帽全球峰会6.6. 创建 pscsi 存储对象
您可以将 配置为支持直接通过 SCSI 命令而无需 SCSI 模拟的后端存储，并且使用 /proc/scsi/scsi 中显示的底层 SCSI 设备（如 SAS 硬盘）。这个子系统支持 SCSI-3 及更高系统。
警告
pscsi 应该仅由高级用户使用。高级 SCSI 命令（如 Asymmetric Logical Unit Assignment (ALUAs) 或 Persistent Reservations（例如被 VMware ESX, 和 vSphere 使用））通常不会在设备固件中实施，并可能导致出现故障或崩溃。如果有疑问，请在生产环境中改为使用 block 后端存储。
先决条件
-
已安装并运行
targetcli。如需更多信息，请参阅安装 targetcli。
流程
从
backstores/目录中进入到pscsi/：/> backstores/pscsi/
/> backstores/pscsi/Copy to Clipboard Copied! Toggle word wrap Toggle overflow 为物理 SCSI 设备创建
pscsi后端存储，本示例中是使用/dev/sr0的 TYPE_ROM 设备：/backstores/pscsi> create name=pscsi_backend dev=/dev/sr0 Created pscsi storage object pscsi_backend using /dev/sr0
/backstores/pscsi> create name=pscsi_backend dev=/dev/sr0 Created pscsi storage object pscsi_backend using /dev/sr0Copy to Clipboard Copied! Toggle word wrap Toggle overflow
验证
验证创建的
pscsi存储对象：/backstores/pscsi> ls
/backstores/pscsi> lsCopy to Clipboard Copied! Toggle word wrap Toggle overflow
'%20d='M201.5%20305.5c-13.8%200-24.9-11.1-24.9-24.6%200-13.8%2011.1-24.9%2024.9-24.9%2013.6%200%2024.6%2011.1%2024.6%2024.9%200%2013.6-11.1%2024.6-24.6%2024.6zM504%20256c0%20137-111%20248-248%20248S8%20393%208%20256%20119%208%20256%208s248%20111%20248%20248zm-132.3-41.2c-9.4%200-17.7%203.9-23.8%2010-22.4-15.5-52.6-25.5-86.1-26.6l17.4-78.3%2055.4%2012.5c0%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.3%2024.9-24.9s-11.1-24.9-24.9-24.9c-9.7%200-18%205.8-22.1%2013.8l-61.2-13.6c-3-.8-6.1%201.4-6.9%204.4l-19.1%2086.4c-33.2%201.4-63.1%2011.3-85.5%2026.8-6.1-6.4-14.7-10.2-24.1-10.2-34.9%200-46.3%2046.9-14.4%2062.8-1.1%205-1.7%2010.2-1.7%2015.5%200%2052.6%2059.2%2095.2%20132%2095.2%2073.1%200%20132.3-42.6%20132.3-95.2%200-5.3-.6-10.8-1.9-15.8%2031.3-16%2019.8-62.5-14.9-62.5zM302.8%20331c-18.2%2018.2-76.1%2017.9-93.6%200-2.2-2.2-6.1-2.2-8.3%200-2.5%202.5-2.5%206.4%200%208.6%2022.8%2022.8%2087.3%2022.8%20110.2%200%202.5-2.2%202.5-6.1%200-8.6-2.2-2.2-6.1-2.2-8.3%200zm7.7-75c-13.6%200-24.6%2011.1-24.6%2024.9%200%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.1%2024.9-24.6%200-13.8-11-24.9-24.9-24.9z'/%3e%3c/svg%3e){kind=small}