求助：有人用HP Storageworks Library and Tape tools这个工具测试过虚拟磁带库吗？

oniziga

从虚拟磁带库上虚拟的都是HP的磁带库和磁带机，但是在HP Storageworks  Library and Tape tools中磁带机总是不能recognized，从而不能进行性能测试。
改了磁带机的firmware还是不行。

wolfheader

虚拟出来的还是跟真是的有区别，不能通过hp工具的验证

[ 本帖最后由 wolfheader 于 2008-11-11 11:57 编辑 ]

redwaves

牛人

cncqpansky

There is a significant difference between the raw data rate of a disk and the rate at which files can be read from a file system. This is because traversing a file system requires multiple, random disk accesses; whereas, a continuous read is limited only by the optimized data rates of the disk.
The difference between these two modes becomes more significant as file size reduces. For file systems where the files are typically smaller than 64 KB, sequential (or disk image) backups should be considered to achieve the data rates supported by high speed tape drives.
To measure the data rate from the disk subsystem, use PAT, HPReadData or the System Performance Backup Pre-Test of L&TT and select the method used by the backup - file-by-file or sequential (note that PAT is the only tool that measures sequential performance). These tools give the actual read transfer rate that the disk system can provide which can be compared with the expected data rate.

cncqpansky

你可以试试PAT或者TAPEperf

wolfheader

看看真正的hp带库