Maintaining Mirrored Systems

CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems

Replacing a faulty disk

72

 

 

Step 4: Remove state database replicas (boot disks only)

When you replace a boot disk, you must remove the state database replicas from the old disk and recreate them on the new one. A boot disk is one that is a member of metadevice d11 or d12 (see “Step 2: Identify the submirrors” on page 70).

If you fail to remove old replicas, the software will have an inaccurate picture of the replicas existing on your system and will attempt to write to nonexistent database replica files.Match up the device description lines to determine which disk drive has problems.

In general, the procedure is a three-step process:

1.Issue a metadb -icommand to find out which replicas to remove.

2.Issue a metadb -dcommand to do the actual deletion.

3.Issue another metadb -icommand to verify the deletion.

If the faulty disk were c0t1d0, for example, the replica deletion might resemble the following series of commands and responses:

#metadb -i

flags

 

first blk

block count

 

a m

p

luo

16

1034

/dev/dsk/c0t0d0s1

a

p

luo

1050

1034

/dev/dsk/c0t0d0s1

a

p

luo

2084

1034

/dev/dsk/c0t0d0s1

a

p

luo

3118

1034

/dev/dsk/c0t0d0s1

a

p

luo

16

1034

/dev/dsk/c1t4d0s1

a

p

luo

1050

1034

/dev/dsk/c1t4d0s1

a

p

luo

2084

1034

/dev/dsk/c1t4d0s1

#metadb -d c1t4d0s1

#metadb -i

 

flags

 

first blk

block count

 

a m

p

luo

16

1034

/dev/dsk/c0t0d0s1

a

p

luo

1050

1034

/dev/dsk/c0t0d0s1

a

p

luo

2084

1034

/dev/dsk/c0t0d0s1

a

p

luo

3118

1034

/dev/dsk/c0t0d0s1

 

 

 

 

 

 

Step 5: Replace the faulty disk drive

1.Remove the faulty disk drive.

2.Install the new disk drive into the same slot the faulty drive came out of. For installation instructions, see the documentation that came with the disk drive or the Lucent hardware installation manual.

3.Partition the new disk using the format command. See “Partitioning disks with the format command” on page 76 . Make sure you partition the new disk drive!

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Lucent Technologies 585-210-940 manual Remove state database replicas boot disks only, Replace the faulty disk drive
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585-210-940 specifications

Lucent Technologies, founded in 1996 as a spin-off from AT&T, emerged as a leader in telecommunications, contributing significantly to the advancement of network technologies. The model 585-210-940, an innovative product from Lucent, exemplifies their commitment to providing cutting-edge solutions for communication networks.

The 585-210-940 is primarily recognized as a digital cross-connect system (DCS) designed to manage and route digital voice and data traffic efficiently. This system plays a crucial role in facilitating seamless communication by allowing service providers to interconnect different digital circuits and manage bandwidth effectively. One of the main features of the 585-210-940 is its ability to support multiple protocols, which enhances interoperability among diverse communication platforms.

A standout characteristic of this system is its scalability. The 585-210-940 can adapt to growing network demands, making it suitable for both small enterprises and large service providers. This flexibility ensures that users can expand their systems without a complete overhaul, thereby reducing costs and downtime during upgrades. Additionally, the system provides fault tolerance, ensuring high availability and reliability, which are essential metrics for any critical telecommunications infrastructure.

Lucent Technologies also integrated advanced monitoring and management capabilities into the 585-210-940. This feature allows operators to track performance metrics and identify potential issues in real time. The system includes a user-friendly interface that simplifies network management tasks, making it accessible to operators with varying levels of technical expertise.

Moreover, the 585-210-940 is designed to support high capacity, handling numerous channels simultaneously without compromising performance. This capability is particularly beneficial in environments with heavy data traffic, such as urban centers or large corporate hubs.

In conclusion, Lucent Technologies' 585-210-940 serves as a robust solution for telecommunications, encapsulating many of the core innovations of the late 20th century. With its support for multiple protocols, scalability, fault tolerance, and advanced management capabilities, it stands out as an essential component for any modern communication network, reflecting Lucent's legacy in the industry.
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