Other 

What is Zpool status?

Raymond

What is Zpool status?

The zpool status command also shows whether any known errors are associated with the pool. These errors might have been found during data scrubbing or during normal operation. ZFS maintains a persistent log of all data errors associated with a pool. This log is rotated whenever a complete scrub of the system finishes.

How do I check Zpool properties?

Querying ZFS Properties

  1. The simplest way to query property values is by using the zfs list command.
  2. The -s option to zfs get enables you to specify, by source type, the properties to display.
  3. The zfs get command supports the -H and -o options, which are designed for scripting.

How do I fix Zpool?

Repair the failures, such as:

  1. Replace the faulted or missing device and bring it online.
  2. Restore the faulted configuration or corrupted data from a backup.
  3. Verify the recovery by using the zpool status -x command.
  4. Back up your restored configuration, if applicable.

What is Zpool list?

The zpool list shows parity space as storage space. used Amount of storage space used within the pool. The space usage properties report actual physical space available to the storage pool. The physical space can be different from the total amount of space that any contained datasets can actually use.

What is Zpool upgrade?

zpool upgrade. Displays pools which do not have all supported features enabled and pools formatted using a legacy ZFS version number. These pools can continue to be used, but some features may not be available. Use zpool upgrade -a to enable all features on all pools (subject to the -o compatibility property).

How do I make a Zpool?

To create a storage pool, use the zpool create command. This command takes a pool name and any number of virtual devices as arguments. The pool name must satisfy the naming requirements in ZFS Component Naming Requirements.

What is Ashift 12?

ashift=12 and recordsize=1M will give you more space than ashift=9 and recordsize=128K (the default). I know I will get less usable space with ZFS, but when you calculate your 6 effective drives should give 24TB and you only get 20TB of usable space, I’m giving in almost 3 drives worth of space for parity.

How do I fix degraded Zpool?

At a high level, replacing a specific faulted drive takes the following steps:

  1. Identify the FAULTED or UNAVAILABLE drive.
  2. zpool replace the drive in question.
  3. Wait for the resilver to finish.
  4. zpool remove the replaced drive.
  5. zpool offline the removed drive.
  6. Perform any necessary cleanup.

How do I reset Zpool?

To restart zFS, reply r to message nn . (For example, r 1,r ). If you want zFS to remain stopped, you can reply i to remove the prompt.

How do I know what version of Zpool I have?

Fortunately, it’s quite easy to find out which versions you are running – simply run: # zpool upgrade If you want a more detailed readout, including the features of the pool version you have, try: # zpool upgrade -v Your output should look something like this: # zpool upgrade -v This system is currently running ZFS …

What is ZFS scrubbing?

ZFS Data Scrubbing and Resilvering When a device is replaced, a resilvering operation is initiated to move data from the good copies to the new device. This action is a form of disk scrubbing.

What does Zpool export do?

The manpage for “zpool export” states: Exports the given pools from the system. All devices are marked as exported, but are still considered in use by other subsystems. The devices can be moved between systems (even those of different endianness) and imported as long as a sufficient number of devices are present.

What does zpool status mean?

The zpool status command indicates the existence of a checkpoint or the progress of discarding a checkpoint from a pool. The zpool list command reports how much space the checkpoint takes from the pool. Clears device errors in a pool. If no arguments are specified, all device errors within the pool are cleared.

How do I check the health of a zpool?

The simplest way to request a quick overview of pool health status by zpool status -x command. 2. Detailed Health Status You can request a more detailed health summary by using the -v option to see if pool state is ONLINE. Example of a pool in ONLINE state.

Which subcommands are logged persistently to the pool in zpool?

All subcommands that modify state are logged persistently to the pool in their original form. The zpool command provides subcommands to create and destroy storage pools, add capacity to storage pools, and provide information about the storage pools. The following subcommands are supported:

How do I check the status of a ZFS pool?

Index Querying ZFS Storage Pool Status The zpool listcommand provides several ways to request information regarding pool status. The information available generally falls into three categories: basic usage information, I/O statistics, and health status. All three types of storage pool information are covered in this section.