实体机为windowx XP with SP3, 虚拟软体为vmware server 2, 虚拟环境为 cpu两颗, ram 1024M, disk 2颗scsi disk, 1G与8G, 并开启usb功能. 外接硬碟盒为 双城 e-DATA II 3500, 内部介面为SATA可接两颗硬碟, 外部介面有eSTATA与USB, 目前是接USB vmware server的usb功能为可选择接取实体机上几乎所有USB装置, 因为想省掉虚拟层的效能消耗, 所以将外接硬碟盒接USB port并使用 vmware server的usb功能接进里面的OS, 也就是FreeBSD. FreeBSD有抓到该外接盒与硬碟, 甚至是外接盒的转接晶片都有抓到, 硬碟型号也都有取得, 但系统要access硬碟时, console就会出现错误讯息, /var/log/messages也会纪录到, 且此时硬碟I/O就会卡住一下, 若继续存取则会造成资料损毁的状况. 以下为/var/run/dmesg.boot的节录讯息 Root mount waiting for: usbus1 usb_alloc_device: set address 2 failed (USB_ERR_TIMEOUT, ignored) ugen1.2: <Silicon Image, Inc> at usbus1 umass0: <Silicon Image, Inc 5744 FW:1.1516, class 0/0, rev 2.00/0.62, addr 2> on usbus1 umass0: SCSI over Bulk-Only; quirks = 0x0000 Root mount waiting for: usbus1 umass0:1:0:-1: Attached to scbus1 uhub_explore: illegal enable change, port 1 Trying to mount root from ufs:/dev/da0s1a da2 at umass-sim0 bus 0 scbus1 target 0 lun 0 da2: <WDC WD10 WD-WCAV5650 > Fixed Direct Access SCSI-2 device da2: 40.000MB/s transfers da2: 953869MB (1953525169 512 byte sectors: 255H 63S/T 121601C) (da2:umass-sim0:0:0:0): READ(10). CDB: 28 0 74 70 6d b0 0 0 1 0 (da2:umass-sim0:0:0:0): CAM status: SCSI Status Error (da2:umass-sim0:0:0:0): SCSI status: Check Condition (da2:umass-sim0:0:0:0): SCSI sense: ABORTED COMMAND asc:0,0 (No additional sense information) (da2:umass-sim0:0:0:0): READ(10). CDB: 28 0 74 70 6d b0 0 0 1 0 (da2:umass-sim0:0:0:0): CAM status: SCSI Status Error (da2:umass-sim0:0:0:0): SCSI status: Check Condition (da2:umass-sim0:0:0:0): SCSI sense: ABORTED COMMAND asc:0,0 (No additional sense information) (da2:umass-sim0:0:0:0): READ(10). CDB: 28 0 74 70 6d b0 0 0 1 0 (da2:umass-sim0:0:0:0): CAM status: SCSI Status Error (da2:umass-sim0:0:0:0): SCSI status: Check Condition (da2:umass-sim0:0:0:0): SCSI sense: ABORTED COMMAND asc:0,0 (No additional sense information) (da2:umass-sim0:0:0:0): READ(10). CDB: 28 0 74 70 6d b0 0 0 1 0 (da2:umass-sim0:0:0:0): CAM status: SCSI Status Error (da2:umass-sim0:0:0:0): SCSI status: Check Condition (da2:umass-sim0:0:0:0): SCSI sense: ABORTED COMMAND asc:0,0 (No additional sense information) (da2:umass-sim0:0:0:0): READ(10). CDB: 28 0 74 70 6d b0 0 0 1 0 (da2:umass-sim0:0:0:0): CAM status: SCSI Status Error 以下为存取时出现的错误讯息 Aug 5 19:17:13 server kernel: (da2:umass-sim0:0:0:0): SYNCHRONIZE CACHE(10). CDB: 35 0 0 0 0 0 0 0 0 0 Aug 5 19:17:13 server kernel: (da2:umass-sim0:0:0:0): SCSI sense: ABORTED COMMAND asc:0,0 (No additional sense information) Aug 5 19:17:25 server kernel: (da2:umass-sim0:0:0:0): SYNCHRONIZE CACHE(10). CDB: 35 0 0 0 0 0 0 0 0 0 Aug 5 19:17:25 server kernel: (da2:umass-sim0:0:0:0): SCSI sense: ABORTED COMMAND asc:0,0 (No additional sense information) uname -a如下 FreeBSD server.home.private-ip 8.1-STABLE FreeBSD 8.1-STABLE #0: Thu Aug 5 16:02:32 CST 2010 [email protected]:/usr/obj/usr/src/sys/VMSRV32 i386 很久之前有找到用camcontrol可以调整修正此问题, 但忘了保存该设定方式即重灌, 现在怎样google也找不到解决方式了, 希望有过经验的人能给予指引, 若有资讯不足 的部分也请说明, 我再补上, 感激不尽. --

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