问个有关estimated capacity的问题

"The ESTCAPACITY parameter specifies the estimated capacity for volumes assigned to this device class.
Tivoli Storage Manager estimates the capacity of the volumes in a storage pool based on the parameters assigned to the device class associated with the storage pool.
For tape device classes, the default values selected by the server depend on the recording format used to write data to the volume.
You can either accept the default for a given device type or specify a value."

上面意思说TSM根据和某存储池相关联的设备类的参数来估计此存储池中的磁带的容量吧？

一个池中可以即有LTO2的磁带，也有LTO3的磁带吧？

为什么我的一个池中的磁带的estimated capacity大都不相同呢？并且还有一盘磁带的estimated capacity为0，我想直到为什么。

[[i] 本帖最后由 ww_ln 于 2008-3-16 22:49 编辑 [/i]]

[quote]原帖由 [i]ww_ln[/i] 于 2008-3-16 22:47 发表 [url=http://bbs.loveunix.net/redirect.php?goto=findpost&pid=766573&ptid=82176][img]http://bbs.loveunix.net/images/common/back.gif[/img][/url]
"The ESTCAPACITY parameter specifies the estimated capacity for volumes assigned to this device class.
Tivoli Storage Manager estimates the capacity of the volumes in a storage pool based on th ... [/quote]

LTO2和LTO3可以共存，LTO的宣传也是这么说的，前提是你的带库要有LTO3和LTO2的驱动器，或者只有LTO3的也行，LTO会向下兼容，但是实际中我还没见过这么用的，也可能我见过的都比较小，就那几个驱动器还啥LTO2，LTO3的。

把你的q vol和q libvol贴上来看看

q vol f=d随便挑了3盘同一pool，同一devclass的磁带：
其中A00012就是estimated capacity为0，并且我发现现在没法往这盘磁带上备份。


Volume Name: A00012
             Storage Pool Name: JFPOOL
             Device Class Name: 3580
       Estimated Capacity (MB): 0.0
       Scaled Capacity Applied:
                      Pct Util: 0.0
                 Volume Status: Empty
                        Access: Read/Write
        Pct. Reclaimable Space: 0.0
               Scratch Volume?: No
               In Error State?: No
      Number of Writable Sides: 1
       Number of Times Mounted: 0
             Write Pass Number: 0
     Approx. Date Last Written:
        Approx. Date Last Read:
           Date Became Pending:
        Number of Write Errors: 0
         Number of Read Errors: 0
               Volume Location:
Volume is MVS Lanfree Capable : No
Last Update by (administrator): ADMIN
         Last Update Date/Time: 01/09/08 14:36:19


                   Volume Name: A00008
             Storage Pool Name: JFPOOL
             Device Class Name: 3580
       Estimated Capacity (MB): 284,462.1
       Scaled Capacity Applied:
                      Pct Util: 91.2
                 Volume Status: Filling
                        Access: Read-Only
        Pct. Reclaimable Space: 8.8
               Scratch Volume?: Yes
               In Error State?: Yes
      Number of Writable Sides: 1
       Number of Times Mounted: 2,118
             Write Pass Number: 1
     Approx. Date Last Written: 06/27/07 10:02:09
        Approx. Date Last Read: 11/15/07 16:08:30
           Date Became Pending:
        Number of Write Errors: 1
         Number of Read Errors: 0
               Volume Location:
Volume is MVS Lanfree Capable : No
Last Update by (administrator):
         Last Update Date/Time: 04/10/07 09:30:22



                   Volume Name: A00010
             Storage Pool Name: JFPOOL
             Device Class Name: 3580
       Estimated Capacity (MB): 319,590.7
       Scaled Capacity Applied:
                      Pct Util: 99.9
                 Volume Status: Full
                        Access: Read/Write
        Pct. Reclaimable Space: 0.1
               Scratch Volume?: No
               In Error State?: No
      Number of Writable Sides: 1
       Number of Times Mounted: 44
             Write Pass Number: 1
     Approx. Date Last Written: 02/12/08 09:44:01
        Approx. Date Last Read: 01/08/08 09:44:06
           Date Became Pending:
        Number of Write Errors: 0
         Number of Read Errors: 0
               Volume Location:
Volume is MVS Lanfree Capable : No
Last Update by (administrator): ADMIN
         Last Update Date/Time: 01/02/08 17:45:11

[[i] 本帖最后由 ww_ln 于 2008-3-17 19:52 编辑 [/i]]