Owners Manual

Cause The DDR DMA test is executed after the external loopback test. On certain physical layers the loopback test might
take up to 15 seconds. The driver polls for the completion of the test for 12 seconds only and the DDR DMA fails in
cases where the loopback takes up to 15 seconds.
Using IPv6 with Mozilla Firefox displays certication error
Description A certication error is displayed when using the Mozilla Firefox browser with IPv6, on Red Hat Enterprise Linux 6.x,
to access a HTTPs server. The user cannot continue to access the HTTPs server.
Cause The certicate error occurs due to a known limitation in Mozilla Firefox.
Data unavailability occurs on Dell EMC EqualLogic arrays due
to Linux multipathing
Description Multipathing in Linux using the path_checker, results in data being unavailable on EqualLogic arrays, with rmware
versions 7 or later.
Workaround Do not select the path_checker option while conguring multipathing.
Cause If the patch_checker is used, the array reports a protocol error and sends a request to disconnect the initiator. This
results in a loop where the initiator connects and disconnects the drive. The drive becomes unavailable for any
input or output operations.
Red Hat Enterprise Linux 6.5 displays the error message
Description
When the Serial ATA (SATA) is set to Advanced Technology Attachment (ATA) mode in Red Hat Enterprise Linux
6.5 the operating system displays the following error message:
ata1.01: failed to resume link (Scontrol 0)
This error can be ignored as there is no functionality loss.
Red Hat Enterprise Linux 6.5 fails to boot from iSCSI LUNs
Description
The Red Hat Enterprise Linux 6.5 fails to boot from the iSCSI LUNs, when the tboot package is selected.
Workaround Do not select the tboot package.
Cause The tboot package truncates the kernel command line to 255 bytes. The kernel command line requires more than
300 bytes, when Red Hat Enterprise Linux 6.5 boots from iSCSI. The system fails to boot successfully due to the
truncated command line.
Known issues in Red Hat Enterprise Linux 6.5
Booting with kernel parameters results in DMAR errors
Description:
Booting Red Hat Enterprise Linux 6.5 with “intel_iommu=on" kernel parameter results in DMAR errors.
Installation instructions and important information 19