only enterprise-class SSDs can be relied upon (at all) for safe behavior on power fail. The enterprise-class SSDs have super-capacitors that store enough power to write all data stored in the RAM within the SSD on power fail, and vendors charge three times as much as they do for consumer class SSDs. Some vendors do… Continue reading Problem with SSD corruption on power failure .. flactuation
There is an indication leading you to the conclusion that a node cannot be added to a cluster and steps to follow to correct the problem. That indication is: You issue the mmcrcluster or mmaddnode command and receive the message: 6027-1598 Node nodeName was not added to the cluster. The node appears to already belong to a GPFS™ cluster. Steps… Continue reading Node cannot be added to the GPFS cluster
Quickly mount a NTFS disk read/write on all recent OS X (including Yosemite, El Capitan): Open Application -> Utilities -> Terminal Type mount and look for the line with your disk. It will show something like: /dev/disk3s1 on /Volumes/MyDisk (ntfs, local, noowners, nobrowse) Type the following in the Terminal, replacing /dev/diskXsX with your disk as… Continue reading write-to-ntfs-formated-drives-on-yosemite
How to create JBOD with Areca controller, it is very easy . Since redundancy and failure maintain by ceph itself , it is better to have disks with JBOD instead of Raid when integrated with CEPH. To use Areca in JBOD: – enter RAID setup by pressing Tab/F3 when the Areca BIOS bootstrap tells you… Continue reading Creating JBOD with Areca controller, for Ceph
ISCSI involves two main factors, 1st the ISCSI initator (client) and 2nd ISCSI target (server) which is most often a disk server running any avaiable ISCSI target daemon . ISCSI can be used to mount network drives locally and use as normal disk drives in Linux sense they can be added as /dev/sdX for e.g… Continue reading How does ISCSI works ?