Adaptec SAS RAID Controllers Installationsanleitung PDF herunterladen (Seite 99)

Appendix E Best Practices 85

Pulling a Cable and Reconnecting It To the Same

Port

Wait at least two minutes between pulling a cable and reconnecting it to the same

port on an HBA or JBOD. To avoid confusing the controller, wait until the physical

drives are removed from the display of the GUI and CLI.

Connecting a JBOD With SATA Disks

When connecting a JBOD with SATA disks to an HBA, connection problems might

occur if the JBOD was previously connected to a different HBA. This is due to a SAS

feature called, affiliation. An affiliation is used by the SAS protocol to prevent

multiple SAS initiators (HBAs) from walking on each other when communicating

with SATA drives. To avoid these connection problems, remove the affiliation by

power cycling the JBOD prior to connecting the JBOD to the new HBA.

Best Practices For Cabling to Disk

Enclosures

The HBA supports using a single connection, or path, between a RAID card and a

JBOD. Therefore, when connecting a RAID card to a disk enclosure, be sure to use

only one cable. Using more than one cable does NOT provide redundancy.

Best Practices For Testing Hard Drive

Failure Conditions

When hot-plugging hard drives to test failure conditions, wait at least one minute

between removing the drive and re-inserting it. Waiting one minute gives the

controller time to recognize the removal of the hard drive. In a true failure situation,

a removed drive is replaced with a different hard drive. In testing situations where

the same drive is re-inserted, a one-minute waiting period before re-insertion is

required.

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Adaptec SAS RAID Controllers Installationsanleitung Seite 99