Руководство Пользователя для Spectra Logic nastape 100
Chapter 4. Using the Serial Port Interface
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The Option Enablement Menu gives you the following options:
[1] Change options key string:
Enter the activation key code from Spectra Logic to
enable options for this NAStape.
Caution:
Do not enter or save invalid activation keys. This could disable
existing options.
existing options.
Backup Options [2-5]:
Typing in the option number will toggle the option between
the enabled state and the disabled state.
[?]:
Displays help for this menu.
[Esc]:
Returns you to the TAOS Configuration Menu
3.
Press Esc to return to the TAOS Configuration Menu.
There will be an asterisk (
*
) next to the menu option, indicating that an unsaved
change has been made.
4.
Select
9
to save the changes.
5.
Select
y
when prompted to reboot.
Note:
You must reboot the NAStape in order for the new options to take
effect.
effect.
Jumbo Frames
The use of Jumbo Frames on the Gigabit Ethernet network can enhance performance.
Enlarging the packet size, or maximum transfer unit (MTU), from 1,500 bytes to 9,000
bytes reduces the overhead in the processing of the data over the Ethernet. Fewer
packets are processed, and the CPU load is decreased. Additionally, tape drives
perform better when they are kept fed (streaming) with data. To enable Jumbo Frames,
increase the MTU on the filers, Gigabit Ethernet switch, and the backup host’s Ethernet
adapter. The Ethernet interface on the NAStape will automatically negotiate for the
MTU size.
Enlarging the packet size, or maximum transfer unit (MTU), from 1,500 bytes to 9,000
bytes reduces the overhead in the processing of the data over the Ethernet. Fewer
packets are processed, and the CPU load is decreased. Additionally, tape drives
perform better when they are kept fed (streaming) with data. To enable Jumbo Frames,
increase the MTU on the filers, Gigabit Ethernet switch, and the backup host’s Ethernet
adapter. The Ethernet interface on the NAStape will automatically negotiate for the
MTU size.