VNXe: Unable to get consistent NetWorker DSA backups from the array's Data Mover. (User Correctable)
Summary: Unable to get consistent NetWorker DSA backups of the VNXe. Continually getting messages that too many NDMP sessions are occurring. However, the NetWorker backups are only requesting 3 parallel save streams of the 4 IP addresses, which have parallel settings of 1 each. ...
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Symptoms
Unable to get consistent NetWorker DSA backups of the VNXe
NDMP Service Error: Active NDMP backup/restore streams reach the maximum concurrent streams supported 4. No more NDMP sessions can be started. Wait current backup/restore sessions finish before start new ones
Cause
Stuck sessions on one of the NAS servers.
EXAMPLES:
In c4_safe_ktrace.log
50:13.136129 5 7F3F7AF3D703 mlu:MLU I: MluSnapMgrIsSnapObsolete[6137] Expiration date for Snap snapNDMP1449139037_279 is set
3.8M 7F3560B54703 sade:NDMP: 6:[XXXXXXXCNAS01] Active NDMP backup/restore streams: 1, system configured concurrent streams: 4, maximum concurrent
TIME 2 7F3560B54703 sade:NDMP: 6:[XXXXXXXCNAS01] sessions supported: 4. <<----------------
In server_param
SVDM_A :
name = concurrentDataStreams
facility_name = NDMP
default_value = 4
current_value = 4
configured_value =
user_action = reboot DataMover
change_effective = reboot DataMover
range = (1,4)
description = Number of concurrent data streams
SVDM_B :
name = concurrentDataStreams
facility_name = NDMP
default_value = 4
current_value = 4
configured_value =
user_action = reboot DataMover
change_effective = reboot DataMover
range = (1,4)
description = Number of concurrent data streams
EXAMPLES:
In c4_safe_ktrace.log
50:13.136129 5 7F3F7AF3D703 mlu:MLU I: MluSnapMgrIsSnapObsolete[6137] Expiration date for Snap snapNDMP1449139037_279 is set
3.8M 7F3560B54703 sade:NDMP: 6:[XXXXXXXCNAS01] Active NDMP backup/restore streams: 1, system configured concurrent streams: 4, maximum concurrent
TIME 2 7F3560B54703 sade:NDMP: 6:[XXXXXXXCNAS01] sessions supported: 4. <<----------------
In server_param
SVDM_A :
name = concurrentDataStreams
facility_name = NDMP
default_value = 4
current_value = 4
configured_value =
user_action = reboot DataMover
change_effective = reboot DataMover
range = (1,4)
description = Number of concurrent data streams
SVDM_B :
name = concurrentDataStreams
facility_name = NDMP
default_value = 4
current_value = 4
configured_value =
user_action = reboot DataMover
change_effective = reboot DataMover
range = (1,4)
description = Number of concurrent data streams
Resolution
Reboot the SP that has stuck sessions on the NAS server
The hotfix has been released and is available here:https://kore.corp.emc.com/indexes//code:VNXe:3.1.5:3.1.5.7213336.1.2.008.314.html
Make sure customer upgrades to 3.1.5.7213336 before installing the hotfix.
The hotfix has been released and is available here:https://kore.corp.emc.com/indexes//code:VNXe:3.1.5:3.1.5.7213336.1.2.008.314.html
Make sure customer upgrades to 3.1.5.7213336 before installing the hotfix.
Affected Products
VNXe3200Products
VNXe2 Series, VNXe3200Article Properties
Article Number: 000056918
Article Type: Solution
Last Modified: 15 Sept 2025
Version: 3
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