ADIC Oven 5.4 Manual De Usuario

Operating Guidelines

When operating AMASS 5.4, please make note of the following operating guidelines.

The tape support (TS) system consists of a tape support driver, personality daemons, and a daemon to 
manage the personality daemons. Thie TS system is provided by SGI to manage tape devices. AMASS 
does not require the TS system to run and it has trouble if the TS system is controlling the AMASS drives. 
The 

mediad 

daemon initiates the 

ts 

daemon on the AMASS drives. To disable the 

ts 

daemon, change 

the 

mediad

 configuration, 

/etc/config/mediad.config

, so that the 

mediad

 daemon ignores the 

AMASS drives.

AMASS may require more shared memory than the default size allocated on your operating system. If this 
happens, the following message appears.

AMASS shared memory size of 1692944 bytes exceeds current system limit.

Error getting shared memory via shmget, errno 22 - Invalid argument.

Workaround:

Refer to the 

man

 page for 

system (4)

 on Solaris.

Set the value for 

shmsys:shminfo_shmmax

 in the

 /etc/system

 file to a number that is large 

enough to accommodate AMASS and other processes on your system.

Reboot the Solaris machine.

Customers may experience poor performance in writing/reading from AMASS via ftp. The problem is the 
size of the IO request issued and the amount of IO buffering at the OS level between the application and 
AMASS kernel. This could exist for applications other than FTP as well.

To get better performance use an alternative FTP daemon which can be configured to write/read from 
AMASS with larger block sizes. WU FTPD is one option. A customer may also experience poor performance 
with a FTP client. Please contact ATAC for details.

AMASS may experience a problem with loading media into the S10K (with Scalar DLC). The drive types are 
AIT, but Scalar DLC looks for 8mm for the mount rather than AIT due to a mismatch in parameters. The XDI 
utility sends the drive type AIT rather than 8mm on the mount.

Workaround: 

On the Scalar DLC box, select Configuration > Clients.

Select the AMASS DAS client entry.

Select the aliasing tab.

Change the media type to 

sony_ait

 on the media type alias entry.

Restart Scalar DLC.

Follow the mount procedure as usual.

Note

This procedure is for Scalar DLC 2.x only.