SAS HDD
June 11th, 2008, 15:00
Hello friends
Does anyone or dmitry know, how to did to work´s with SAS Disk on MHDD ?
Best Regards
Does anyone or dmitry know, how to did to work´s with SAS Disk on MHDD ?
Best Regards
Re: SAS HDD
June 12th, 2008, 17:44
Beto,
Why do you *HAVE* to run MHDD on an SAS drive?
Firstly, you'd need to have an SAS controller. Trouble is, it's difficult (I haven't yet succeeded) in finding one that acts as a "simple" SAS controller - they all seem to need to have to initialise the drive on the controller before being recognised.
If you (or anyone on this forum) knows of a basic SAS controller that is designed to handle single drives (rather than RAID or JBOD) then I'd like to hear from them...
Duncan
Why do you *HAVE* to run MHDD on an SAS drive?
Firstly, you'd need to have an SAS controller. Trouble is, it's difficult (I haven't yet succeeded) in finding one that acts as a "simple" SAS controller - they all seem to need to have to initialise the drive on the controller before being recognised.
If you (or anyone on this forum) knows of a basic SAS controller that is designed to handle single drives (rather than RAID or JBOD) then I'd like to hear from them...
Duncan
Re: SAS HDD
June 13th, 2008, 10:21
Hello duncan
Yes was possible to analyze an SAS Hard Drive with an SAS controller, building and JBOD without iniatilize my Controller has that option "not iniatilize" mine its Fas Track , this option "not initialize" only wrote the boot signature on " 55 AA" , i did an test with an empty hard disk, SAS filled with " TEST" after that, add to my controller, and build an JBOD, and select the option " not iniatilize" and only wrote on LBA 0 55 AA,
I want to did and hot swap, on one case from an Server RAID 5, because the another´s good disk 3 SAS Hard Drive , both has 3,000,000 sectors on 00h,
from 0 -to aprox 3,000,000 of lba´s , so im think was manipulated before, and i need to did some tests like if the bad SAS Hard Drive wich show LBA 0, its Translator problem or its Head problems, because pc3000 scsi doesnt support this model, they told me on the future, well, im thinking on tried and hot swap, and i heard about some cases on SCSI, this is Chettah Family, where doing an hot swap could get some sectors, so if i can get sectors doing an hot swap, could be an Translator, or SA problem, and if its not possible , could be Head problem
What do u think?
Best Regards from Mexico
Alberto
Yes was possible to analyze an SAS Hard Drive with an SAS controller, building and JBOD without iniatilize my Controller has that option "not iniatilize" mine its Fas Track , this option "not initialize" only wrote the boot signature on " 55 AA" , i did an test with an empty hard disk, SAS filled with " TEST" after that, add to my controller, and build an JBOD, and select the option " not iniatilize" and only wrote on LBA 0 55 AA,
I want to did and hot swap, on one case from an Server RAID 5, because the another´s good disk 3 SAS Hard Drive , both has 3,000,000 sectors on 00h,
from 0 -to aprox 3,000,000 of lba´s , so im think was manipulated before, and i need to did some tests like if the bad SAS Hard Drive wich show LBA 0, its Translator problem or its Head problems, because pc3000 scsi doesnt support this model, they told me on the future, well, im thinking on tried and hot swap, and i heard about some cases on SCSI, this is Chettah Family, where doing an hot swap could get some sectors, so if i can get sectors doing an hot swap, could be an Translator, or SA problem, and if its not possible , could be Head problemWhat do u think?
Best Regards from Mexico
Alberto
Re: SAS HDD
June 14th, 2008, 6:44
Hello beto,
The hotswap is good idea, but has some risk too!
I think, if the data is important, don't do that yust only for some test.
I try to understand whats happening, but not so clear for me, just a little.
Can you write down the general issue?
The hardware raid cards uses some "header" usually on the first X kb on the disk.
But you can assemble the raid in readonly mode under linux (without the hardware raid) to do some test, and make an image backup for testing...
Regars,
Janos
The hotswap is good idea, but has some risk too!
I think, if the data is important, don't do that yust only for some test.
I try to understand whats happening, but not so clear for me, just a little.
Can you write down the general issue?
The hardware raid cards uses some "header" usually on the first X kb on the disk.
But you can assemble the raid in readonly mode under linux (without the hardware raid) to do some test, and make an image backup for testing...
Regars,
Janos
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