HP Clustered FileSystem3.6.1 for Windows release notes (T4422-96003, September 2008)

the local Explorer window. You will need to close and reopen Explorer to see
the
renamed director y.
• Memory-mapped files are not coherent across nodes. Because PSFS is a shared
filesystem, the same file canbemappedintomemoryonmorethanone node.
When a
change is made to a file on a remote node, the local node does not see
the change immediately. This occurs because the operating system on the remote
node may not immediately write the change to disk. Consequently, PSFS allows
writes to files that are being executed on other nodes.
• If the Bypass Traverse Checking privilege is not enabled, differences in traverse
access checking for Directory Change Notifi cation (D CN) may be observed. On
NTFS, before a change notify request is completed, an access check is performed
to
determine whether the subscriber has traverse access to the d irectory in which
the
contents were modified. If the subscriber does not have traverse a cc ess, the
change notification will not b e delivered.
On PSFS, this check is not performed and the contents of directories (e.g., the
names of files) may beexposed viaDCN to auser who wouldotherwise not
obtain this data. Traverse access checking other than during directory change
notification is as expected, so acc ess to file contents is not compromised. The
user is advised not to depend on traverse access checking to protect sensitive
data that is encoded in the names of files or directories. Instead, the user should
place sensitive data in files a nd should rely on file security descriptors to deny
access to the files’ contents by unauthorized users.
• On NTFS, a change to an long fi le name (LFN) results in a change notification
using the LFN, and a change to a short file name (SFN) results in a change
notification using the SFN. On PSFS, the change notification can use either
the LFN
or SFN in either case.
• PSFS does not support direct renaming of an unnamed primary stre am to
Alternate Data Streams (ADS). PSFS does support copying an unnamed primary
stream to ADS.
• With PSFS, a file cannot be renamed or deleted, either locally or remotely,
if
any of its Alternate Data Streams (ADS) are still open (with or without
SHARE_DELETE) .
Win
dows utilities and services
The following Windows utilities differ in operation on NTFS and PSFS filesystems:
• Disk checks. In both Windows Explorer and the Disk Management utility, you
can
right-click a disk volume to see its properties. The Tools tab on the Properties
wi
ndow includes an option to check the disk volume for errors. This option
cannot be used with PSFS filesystems. Also, the command-line chkdsk utility
cannot be used to check for errors. In place of these utilities, use the HP Clustered
F
ileSystem psfscheck utilitytocheck thedisk. Seethe HP Clustered File System
Administration Guide for details about the utility.
• Remote Storage Service. The Remote Storage Service might not operate correctly.
If the
cluster has a large number of disks, you may see error messages generated
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