Galaxy Metal Gear 65 manual Rescanning All Ports, Pausing I/O

Do not stay in the Hot Swap Pause mode for too long; otherwise, an operating system time-out may occur (the time varies according to the operating system). For example, in Windows NT, the default limitation during I/O activity is 10 seconds.

System Configuration

5.9 Rescanning All Ports

You can tell the Galaxy 65 Subsystem to scan all disk ports for new or removed disk drives. You can use this option when you install or remove disk drives. The rescan temporarily pauses all I/O processes, then resumes normal operation.

If you are using an enclosure with an EMP, the Galaxy 65 Subsystem performs a rescan automatically. With an EMP, the EMP detects the change in drive status and updates the Galaxy 65 Subsystem about removed drives almost immediately; however, installed drives will be detected after a three-minute delay. This delay is to allow the new drives to spin up.

To rescan all ports:

1From SAM, select Manage Galaxy 65 Subsystem > Utilities. The Rescan page displays.

2Click Rescan.

5.10 Pausing I/O

Most drive enclosures allow you to remove and replace drives while FC device port activity continues. However, you may still want to pause I/O if you are replacing more than one disk drive. The Hot Swap Pause option suspends activity on all device channels used in the Galaxy 65 Subsystem, thereby ensuring data integrity on the connected drives and arrays.

Caution Pausing I/O halts active I/O to the host.

Note If you are not sure that your enclosure supports hot swapping, use the Hot Swap Pause option before you remove or replace any drives in an array.

To pause I/O:

1From SAM, select Manage Galaxy 65 Subsystem > Utilities > Hot Swap Pause. The Hot Swap Pause page displays.

2Click Pause.

3When you have replaced the drive, resume I/O activity by clicking Unpause.

Caution

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