Owner manual

Agent information 52
• Narrow (8 bits)—The negotiated data transfer width for this drive is narrow (8 data bits).
• Wide (16 bits)—The negotiated data transfer width for this drive is wide (16 data bits).
• Unknown—The Storage Agents are unable to determine the current negotiated data transfer width for this
drive.
• Current Speed—Displays the current negotiated data transfer speed for Parallel SCSI tape drives. The possible
values are:
• Asynchronous—The current data transfer speed for this drive is asynchronous.
• Fast—The current data transfer speed for this drive is 10 million transfers per second.
• Ultra—The current data transfer speed for this drive is 20 million transfers per second.
• Ultra2—The current data transfer speed for this drive is 40 million transfers per second.
• Ultra3—The current data transfer speed for this drive is 80 million transfers per second.
• Unknown—The agent is unable to determine the current negotiated data transfer speed for this drive.
NOTE: If the current data transfer width is Narrow (8 bits) then the speed in megabytes per second is
equal to the million transfers per second speed. If the current width is Wide (16 bits) then the speed
in megabytes per second is twice the million transfers per second speed. For example, if the current
speed is Ultra and the width is Wide then the speed would be 40 megabytes per second.
• Negotiated Link Rate—Displays the negotiated link rate for SAS and SATA tape drives. The possible values are:
• 1.5 Gbps—The negotiated link rate for this drive is 1.5 gigabits per second.
• 3.0 Gbps—The negotiated link rate for this drive is 3.0 gigabits per second.
• Unknown—The agent is unable to determine the negotiated link rate for this tape drive.
• Magazine Size—Displays the magazine size of autoloader tape drives. For single tape devices, the magazine
size is N/A.
• Placement—Indicates whether the tape drive is in an internal or external storage system. The following values
are valid:
• Internal—The tape drive is in an internal storage system.
• External—The tape drive is in an external storage system.
• Unknown—The tape drive is not in a storage system or the Storage Agents cannot determine the drive
placement.
—This symbol indicates that the drive is a hot-plug drive.
• Library Drive—Indicates whether the tape drive is included in a tape library. The following values are valid:
• Yes—The tape drive is included in a tape library.
• No—The tape drive is not included in a tape library.
• Unknown—The Storage Agents are unable to determine if the tape drive is included in a tape library.
• Tape Errors—Displays the total number of read and write errors encountered. This value is maintained from the
moment the Tape Hardware Interface driver was loaded.
Tape errors may occasionally occur. If this value rises dramatically, clean the device. If you continue to have
errors, you may have a problem. Some common causes of these errors include radio frequency interference
(RFI) on the bus cables, bad or missing terminating resistors on the drives, or having more than one device with
the same SCSI ID. Ensure the bus cable is free of obstructions and that the devices on the bus are properly
configured.
• Uncorrectable—Displays the total number of read and write errors which could not be corrected. This value is
maintained from the moment the Tape Hardware Interface driver was loaded.
Uncorrectable errors may occasionally occur. If this value rises dramatically, clean the device. If you continue to
have errors, you may have a problem. Some common causes include radio frequency interference (RFI) on the
bus cables, bad or missing terminating resistors on the drives, or having more than one device with the same
SCSI ID. Ensure the bus cable is free of obstructions and that the devices on the bus are properly configured.
• Rereads—Displays the number of times blocks that had to be reread from the device. This value is maintained
from the moment the Tape Hardware Interface driver was loaded.
Reread errors may occasionally occur. If this value rises dramatically, clean the device. If you continue to have
rereads, you may have a problem. Some common causes include radio frequency interference (RFI) on the bus
cables, bad or missing terminating resistors on the drives or having more than one device with the same SCSI
ID. Ensure the bus cable is free of obstructions and that the devices on the bus are properly configured.