Skip to main content
Sign Out

Welcome to Dell

My Account
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Enjoy members-only rewards and discounts
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.
Sign In Create an Account Dell Financial Services Premier Sign In Partner Program Sign In
Contact Us

Your Dell.com Carts

Dell SRDF Introduction

PDF

Device pair states

Device pairs that are part of an SRDF operation must be in the correct state.

Table 1. SRDF pair statesThis table lists the states that a device pair can be in.
Pair State Description
SyncInProg Synchronization is in progress between the R1 and the R2 devices. There are existing invalid tracks between the two pairs and the logical links between both sides of an SRDF pair are up.
Synchronized The R1 and the R2 are in a synchronized state. The same content exists on the R2 as the R1 and there are no invalid tracks between the two pairs.
Split The R1 and the R2 are ready to their hosts. However, the SRDF links are not ready or are write-disabled.
Failed Over The R1 is not ready or write disabled. Operations have been failed over to R2.
R1 Updated The R1 is not ready or write disabled to the host. There are no local invalid tracks on the R1 side, and the links are ready or write disabled.
R1 UpdInProg The R1 is not ready or write disabled to the host. There are invalid local (R1) tracks on the source side. So data is being copied from the R2 to the R1 device, and the links are ready.
ActiveActive The R1 and the R2 are in the default SRDF/Metro configuration which uses an Array Witness or Virtual Witness:
  • There are no invalid tracks between the two pairs.
  • The R1 and the R2 are Ready (RW) to the hosts.
ActiveBias The R1 and the R2 are in an SRDF/Metro configuration using bias:
  • The user has specified “use bias” during the establish or restore action, or the required Witness is not available.
  • There are no invalid tracks between the two pairs.
  • The R1 and the R2 are Ready (RW) to the hosts.
Suspended The SRDF links have been suspended and are not ready or write disabled. If the R1 is ready while the links are suspended, any I/O accumulates as invalid tracks owed to the R2.
Partitioned The SYMAPI is unable to communicate through the corresponding SRDF path to the remote array. The Partitioned state may apply to devices within an SRDF group. For example, if SYMAPI is unable to communicate with a remote array from an SRDF group, devices in that group are in the Partitioned state. A half pair and a duplicate pair are also reported as Partitioned.
Mixed A composite SYMAPI device group SRDF pair state. There are different SRDF pair states within a device group.
Invalid This state is the default when no other SRDF state applies.
  • The combination of the R1 device, the R2 device, and the SRDF link states do not match any other pair state.
  • This state may occur if there is a problem at the disk director level.
Consistent The R2 SRDF/A capable devices are in a consistent state. The consistent state signifies the normal state of operation for device pairs operating in asynchronous mode.
Transmit Idle The SRDF/A session cannot send data in the transmit cycle over the link because the link is unavailable.

Rate this content

Accurate
Useful
Easy to understand
Was this article helpful?
0/3000 characters
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please select whether the article was helpful or not.
  Comments cannot contain these special characters: <>()\