Smb clients, Viewing quota information, Differences in locking behavior – HP StoreAll Storage User Manual

Page 92: Smb shadow copy

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SMB clients

SMB clients access shares on the IBRIX software cluster in the same way they access shares on a
Windows server.

Viewing quota information

When user or group quotas are set on a file system exported as an SMB share, users accessing
the share can see the quota information on the Quotas tab of the Properties dialog box. Users
cannot modify quota settings from the client end.

SMB users cannot view directory tree quotas.

Differences in locking behavior

When SMB clients access a share from different servers, as in the IBRIX software environment, the
behavior of byte-range locks differs from the standard Windows behavior, where clients access a
share from the same server. You should be aware of the following:

Zero-length byte-range locks acquired on one file serving node are not observed on other file
serving nodes.

Byte-range locks acquired on one file serving node are not enforced as mandatory on other
file serving nodes.

If a shared byte-range lock is acquired on a file opened with write-only access on one file
serving node, that byte-range lock will not be observed on other file serving nodes. ("Write-only
access" means the file was opened with GENERIC_WRITE but not GENERIC_READ access.)

If an exclusive byte-range lock is acquired on a file opened with read-only access on one file
serving node, that byte-range lock will not be observed on other file serving nodes. ("Read-only
access" means the file was opened with GENERIC_READ but not GENERIC_WRITE access.)

SMB shadow copy

Users who have accidently lost or changed a file can use the SMB shadow copy feature to retrieve
or copy the previous version of the file from a file system snapshot. IBRIX software supports SMB
shadow copy operations as follows.

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Using SMB

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