Drives With Two Ports
20
SL150 Systems Assurance
July 2012
• SGX-SAS6-EM-Z
SAS-2 Configuration Issues
The Solaris 10 Update 8 and later SAS driver disrupts communications between
Oracle Solaris and common tape backup applications. The SAS driver only allows
one device driver to attach per device (sg, sgen, st, and so forth). Users must have
every component in the following list to be affected:
• Oracle Solaris 10 Update 8 or later or Solaris 11
• Any SAS-2 HBA
• Tape drives or libraries using a SAS-2 connection
• A backup application that requires multiple SAS drivers. The most common
backup applications that use multiple device drivers include:
• CA ARCserve
• EMC Networker
• HP Data Protector
• IBM Tivoli Storage
• Symantec NetBackup
A SAS tape drive attached through the SAS-2 HBA will work on the Solaris system
using just the Solaris native commands such as
dd
or
tar
.
Drives With Two Ports
When a tape drive has two ports, host applications can treat the second drive port as
a failover port. The library may report a Check Condition to a command received on
one port when the other port is busy with a library command. When a host
application receives either of the following
new
Check Conditions, it should reissue
the command:
• Not Ready, Logical Unit Offline (02/04/12h)
• Aborted Command, Logical Unit Communication Failure (OBh/08/00)
Note –
The half-height SAS tape drive has two ports while the
half-height FC tape drive has one port.
Note –
Only some host applications support this feature. Be sure
to check the status of this feature with your application.
Tape Drive Cleaning
LTO drives send a cleaning request to the SL150 and the host application managing
the library (or partition). You can handle cleaning in either of two ways:
• Automatically manage cleaning by configuring the host application (for example,
Symantec NetBackup or IBM Tivoli Storage Manager) for
Automatic
,
Tape Alert
, or
reactive cleaning
depending on the application.
Summary of Contents for StorageTek SL150
Page 6: ...6 SL150 Systems Assurance July2012 ...
Page 8: ...8 SL150 Systems Assurance July2012 ...
Page 10: ...Access to Oracle Support 10 SL150 Systems Assurance July2012 ...
Page 18: ...Tape Drives and Media 18 SL150 Systems Assurance July2012 ...
Page 22: ...Tape Drive Cleaning 22 SL150 Systems Assurance July2012 ...
Page 32: ...Tape Slot Locations 32 SL150 Systems Assurance July2012 ...
Page 50: ...Activity and Processes 50 SL150 Systems Assurance July2012 ...