Release Notes

Release Notes— Fluid Cache for SAN for Linux Systems
XFS Hangs During File System Creation
ISSUE: On RHEL 6.4, the XFS files system may become unresponsive. During creation of the file
system, this may occur because of a deadlock between the xfssyncd and xfsbufd daemons.
Consequently, several kernel threads become unresponsive and the XFS file system cannot be
successfully created, leading to a kernel oops. A patch is available to prevent this situation by
forcing the active XFS log onto a disk. For more details, see the bug report at
https://bugzilla.redhat.com/show_bug.cgi?id=1014867.
WORKAROUND: A patch that addresses this issue is available at
http://rhn.redhat.com/errata/RHSA-2013-1645.html.
XFS Hangs During Normal System Operation
ISSUE: On RHEL 6.4 and SLES 11 SP3, the XFS file system may become unresponsive when
running a large number of file operations. For more details, see the bug report at
http://oss.sgi.com/bugzilla/show_bug.cgi?id=922.
WORKAROUND: N/A
Btrfs Hangs During Normal System Operation
ISSUE: Under some circumstances, the Btrfs file system becomes unstable, goes into read-only
mode, and becomes unresponsive.
WORKAROUND: N/A
Btrfs Hangs During Normal System Operation
ISSUE: When using the Btrfs file system on SLES 11 SP3, under some circumstances the kernel
can become so busy dumping stack traces that the operating system starts sending non-
maskable interrupts (NMI) and becomes unresponsive.
WORKAROUND: N/A
Ext4 Data Integrity Issues
ISSUE: When using the Ext4 file system, under some circumstances data at the end of a cached
file may be lost, or data within a file may be lost.
WORKAROUND: N/A
Dell - Internal Use - Confidential
Confidential Page 8 5/5/2015