Instructions for Using the RAIDSEND Utility 

The IBM SCSI-2 F/W PCI-Bus RAID Adapter, IBM F/W Streaming RAID Adapter/A, and IBM DAC96O PCI RAID Adapter supported in the PC Server 704 provide the RAIDSEND utility as a means for Data Scrubbing under OS/2. The RAIDSEND utility is available on the IBM RAID Supplemental Diskette. The RAIDSEND utility may be coupled with a third party event scheduler such as REXXWARE by Simware Corporation at Syntax of RAIDSEND is described below.

  1.  At a command prompt, type the following:

     'raidsend synch <adapter #> drive <logical drive #>'

     where the adapter number starts at 1 and logical drive number starts at 0.

The IBM RAID Configuration Diskette 'View Configuration' screen will display the logical drive numbers available for each adapter. It is important to note that logical drive numbers arc displayed in the format of<array><logical drive number>. An example is 'A0', where 'A' refers to array A, and '0' refers to logical drive 0 in array A. To translate this into the logical drive number needed to run the utility, count all the logical drives beginning with A0. Remember to start counting at zero. The logical drive number used by the utility is the number assigned to the logical drive in question by this counting process. If multiple adapters are installed, the configuration screen will provide an Adapter menu upon boot specifying the adapter numbers. See the following charts for examples on this numbering scheme


  | Logical Drive   | Logical Drive   |
  | No. as seen in  | No. as seen by  |
  |     'View       | the Utility     |
  | Configuration'  |                 |
  |       A0        |       0         |
  |       A1        |       1         |
  |       A2        |       2         |
  |       B0        |       3         |
  |       B1        |       4         |

IBM's approach to Data Scrubbing is somewhat different than some of our competition. Some vendors offer 'background' examination of array drives for sector media defects. However, these examinations are often only active when the drives are not being accessed for significant periods of time. In installations where drives are constantly in use, even to a small extent, examinations of the complete array may not be completed for an extended period of time. IBM RAID adapters allow Data Scrubbing to take place concurrently with other activity.
In this way, users can accomplish complete Data Scrubbing during off-peak periods when the disk subsystem is still actively in use, but not under a heavy performance burden.
Netfinity Manager can be used to help determine when those off-peak periods may be. Consult the Netfinity Manager 5.0 Users Guide for further information on how to do this.

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