New answers tagged sas
So of course there is some trade-off, but I'm not sure the current answers provide any positive use cases. Lets say the biggest benefit of the interposer is the multi-path, which is removing a fairly large single point of failure from the system. Is it worth it for that feature alone? The comparison can't be against buying a SAS drive, because that is ...
Like ewwhite has said in the Accepted answer, it is possible to mix dual and single Port SAS disks in HP ProLiant Servers. Here's the official information from the HPE (Hewlett Packard Enterprise) web site: http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c01766210-1&lang=en-us&cc=us HP SAS Enterprise and Midline Hard Drives - ...
You can make this work with some effort. Normally, I'd be all like, "Use HP drives", but the fact that you're using a G7 ProLiant means that many of the firmware restrictions don't apply from either side. Gen8 ProLiant servers are a totally different story. So, in this case, it's just a formatting issue. The AX4 disks are formatted in 520-byte sectors, ...
Unlikely to work, HP puts its own software onto the disks to keep people coming back to them for legit parts.
is there something we are missing or is this hopeless? They're not supported, HP puts a specific firmware on their disks that provides a lot of additional diagnostic data over an off-the-shelf disk. This site is built for professional sysadmins, we like to build supportable solutions so I'd avoid trying to do what you're attempting.
Finally I got the solution. According to Fujitsu "LSI Logic MegaRAID SCSI WebBIOS Configuration Utility" User's guide, virtual disk initialization can be a good start to remove data from the disk: 22.214.171.124 Initialization The Initialize option initializes the selected logical drive by writing zeroes to the entire volume (if fast initialization is ...
depends how far you want to go with the data protection. A) Destroy the Disks, I mean a big big hammer and destroy the disks really good. B) Delete the data with dd with random or zero bits... C) Using a tool (secure Delete). http://linoxide.com/security/delete-files-permanatly-linux/ But, deleting the RAID will not delete the data, actually, if you create ...
It all depends on how secure you want/need to be. Recreating the RAID won't do much to your data other than re-compute the parity bits (assuming RAID 5 or 6) but you could re-create the RAID as a different level and then DBAN the whole thing. That would be good enough for most non-DOD applications.
SAS-3 supports 12 Gbps while SAS-2 supports 6 Gbps. Many people say that using 12 Gbps disk drives is of no use in present architectures unless there is a flash cache layer in between. 12 Gbps interface can be used with an SSD. See the wikipedia entry on serial attached SCSI.
You are in a very dangerous situation. Simply moving disks to another server does not guarantee being able to boot back up or read out data from them, on the contrary, you risk losing access to your data. RAID data may be stored on disk, or in the controller. In the latter case, when moving disks to another controller (server), the system has no idea what ...
I add this as a pointer to some more relevant research, which is newer than the Google work, and seems to have some rigour to its methodology. Backblaze, the storage pod people, have done an analysis of failure rate vs. temperature by drive model, and find in most cases no correlation. For three models, (two Seagate Barracudas and a Hitachi Deskstar), the ...
Anything under 55-60 C should be ok. Anyway, what is really dangerous for a mechanical drive are repeated thermal excursions, where the drive become hot and rapidly cools. Equally dangerous are repeated spinon/spinoff cycles. As stated by EEAA, if it is a supported setup from DELL, you should fear not.
Server manufacturers put a lot of money into designing their systems to be reliable and to perform within spec for any third-party components that may be included. Dell would not warranty these drives if they were expected to have a short life. If Dell says that this is a supported configuration, then don't worry about it. Modern gear is a lot more ...
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