我们的磁带机是SUN SDLT 220型号的，操作系统Solrais 8,使用的备份命令为tar cvf /dev/rmt/1 *
以前备份30G的数据只要30分钟左右，但是自从一次备份非正常终止后，现在备份要2小时30分左右，后来也没什么错误信息报告。第一错误信息如下
Apr 13 03:13:45 SUN01 scsi: [ID 107833 kern.warning] WARNING: /pci@9,700000/scsi@3,1 (glm4):
Apr 13 03:13:45 SUN01   Target 5 reducing sync. transfer rate
Apr 13 03:13:45 SUN01 glm: [ID 923092 kern.warning] WARNING: ID[SUNWpd.glm.sync_wide_backoff.6014]
Apr 13 03:13:45 SUN01 scsi: [ID 107833 kern.warning] WARNING: /pci@9,700000/scsi@3,1/st@5,0 (st33):
Apr 13 03:13:45 SUN01   Error for Command: write                   Error Level: Fatal
Apr 13 03:13:45 SUN01 scsi: [ID 107833 kern.notice]     Requested Block: 1582598                   8
Apr 13 03:13:45 SUN01 scsi: [ID 107833 kern.notice]     Vendor: QUANTUM
Apr 13 03:13:45 SUN01 scsi: [ID 107833 kern.notice]     Sense Key: Aborted Command
Apr 13 03:13:45 SUN01 scsi: [ID 107833 kern.notice]     ASC: 0x47 (scsi parity error), ASCQ: 0x0, F0
Apr 14 03:02:53 SUN01 scsi: [ID 107833 kern.warning] WARNING: /pci@9,700000/scsi@3,1 (glm4):
Apr 14 03:02:53 SUN01   Target 5 disabled wide SCSI mode
Apr 14 03:02:53 SUN01 glm: [ID 681974 kern.warning] WARNING: ID[SUNWpd.glm.sync_wide_backoff.6012]
Apr 14 03:02:53 SUN01 scsi: [ID 107833 kern.warning] WARNING: /pci@9,700000/scsi@3,1 (glm4):
Apr 14 03:02:53 SUN01   Target 5 reverting to async. mode
Apr 14 03:02:53 SUN01 glm: [ID 802533 kern.warning] WARNING: ID[SUNWpd.glm.sync_wide_backoff.6013]
Apr 14 03:02:53 SUN01 scsi: [ID 107833 kern.warning] WARNING: /pci@9,700000/scsi@3,1/st@5,0 (st33):
Apr 14 03:02:53 SUN01   Error for Command: write                   Error Level: Fatal
Apr 14 03:02:53 SUN01 scsi: [ID 107833 kern.notice]     Requested Block: 10                        0
Apr 14 03:02:53 SUN01 scsi: [ID 107833 kern.notice]     Vendor: QUANTUM
Apr 14 03:02:53 SUN01 scsi: [ID 107833 kern.notice]     Sense Key: Aborted Command
Apr 14 03:02:53 SUN01 scsi: [ID 107833 kern.notice]     ASC: 0x47 (scsi parity error), ASCQ: 0x0, F0
Apr 14 08:50:04 SUN01 scsi: [ID 107833 kern.warning] WARNING: /pci@9,700000/scsi@3,1/st@5,0 (st33):
Apr 14 08:50:04 SUN01   SCSI transport failed: reason 'unexpected_bus_free': giving u

没人碰到这种情况吗？自己顶贴吧

打电话咨询Sun技术服务经分析得到的答复可能是连接磁带机和主机的光缆有问题，建议关机重新插拔一次 呵呵

昨天关机重新插拔磁带机的cable线，早上发现备份速度正常；问题解决同时也希望对大家有所帮助。

线的问题，要么是通，要么是不通，

象上面的问题，叫什么啊？


有新认识了