Hp ESL E-series Tape Libraries Manual de usuario descargar pdf (Pagina 83)

Verifying SCSI b

us conﬁguration

Items to check include:

• Termination —P

roblems with termination can cause intermittent or hard failures. A SCSI bus

mustbeterminatedonbothends. Terminationproblemsarecommonwhenbothnarrowand

wide devices are on the same bus.

• Bus Type —Onan

LVD SCSI bus, SE and LVD devices can be connected to the same bus.

However, if one SE device is detected during power on, communication to all devices converts to

SE mode.

• Device ID —Ea

ch device on a SCSI bus must have a unique ID. V erify that conﬁgured IDs are not

in use by o ther devices on the same SCSI bus.

• Cabling — Check SCSI cables to verify they are functional. Follow SCSI rules for total length,

distance between devices, and stub length. Check and re-seat connections if necessary.

• SCSI Device

s — Verify that the SCSI devices on a particular SCSI bus can be seen in the

Conﬁguration Menu of the FC interface controller. If the FC interface controller cannot see the

devices, verify SCSI conﬁguration,cabling,andtermination.

Verifying F C p ort connection

IfSCSIdevicesarerecognizedontheSCSIbuses,butdonotappeartotheFChost,itmaybethattheFC

link is not properly established. Most hubs and switches have link indicators showing link status. When

the F C interface controller is connected and powered on, this link indicator shou ld be solid. If it is

not, check the cabling or connections.

One method of verifying link integrity when connected to a functional host involves disconnecting and

then reconnecting the FC cable. This procedure should cause momentary activity of this indicator as the

link reinitializes.

Additionally, verify that the cable type of the FC interface controller and the attached hub, HBA, or

switch a re of corresponding types. When using optical media, verify that the attached device is using

non-OFC type optical devices.

NOTE:

By default, the FC port speed is set to 2 Gb/s for the e2400–160 and e2400–FC 2G, and 4 Gb/s

for the e 2400–FC 4G. Changes to the FC port speed must be manually set, such as for 1 Gb/s. If

set incorrectly and the FC interface controller is pluggedintoaLooporFabric,theunitmayreceive

framing errors, which c an be found in the trace logs, and the ﬁber link light will be off because of

the incorrect FC link speed.

Verifying FC and SCSI devices in Windows NT

When mapping F C and SCSI devices, verify the FC and SCSI devices are recognized by the FC interface

controller.

Windows NT may need to be rebooted with all SCSI devices and the FC inter face controller powered on

before recognizing the devices.

To verify the FC and SCSI devices:

1. Navigate to the Windows NT Control Panel, and select SCSI Adapters.

2. Double-click the FC HBA.

The SCSI devices shou ld be listed. If no devices are listed, verify the FC interface controller

conﬁguration, FC HBA conﬁguration, and cabling. If devices are listed, verify the FC HBA mapping

mode or the AL_PA addresses.

HP StorageWorks

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