On Sat, 2005-07-09 at 23:40 +0200, Farkas Levente wrote:
what happends if the 3ware card get wrong? do you always have a backup raid controller
The issue is no different than with tape cartridges.
Yes. I _always_ deploy at least (2) 3Ware cards at any organization, so there is a fall-back in the case of disaster.
(with the same type)?
There is no such thing as "same type" with 3Ware.
As long as you put the volume in a device that is the same or newer firmware, you're fine.
BTW, I have deployed over 50 (five-zero) 3Ware cards and have _never_ had a failure of a device yet. Some are 4+ years old and still in use.
Plus I personally have an original 3Ware Escalade 7800 8-channel at home I have upgraded from Red Hat Linux 6.1 to Fedora Core 3 -- *0* non-sense with LVM/MD.
with software raid you can plug it to any kind of controller and save your data!
That's what backup is for! Geez. ;->
And not always, if they disagree over low-level format. I've had that happen with different SCSI host adapters from different vendors on more than one occasion (and even the same vendor -- OEM v. Retail Adaptec).
And when it comes to RAID-1, it's just a full disk mirror anyway.
at the first place we start to use 3ware's raid5 when it's crashes at the first week and we got a mail from 3ware that it's a known issue with the current firmware. that was enough!
That was the 3Ware Escalade 6000 series. 3Ware added RAID-5 support for the 6000 series when customers requested it. 3Ware regretted ever doing such.
_Never_ seen an issue on the Escalade 7000+ series.
On the 6000 series, I always use just RAID-1 or RAID-10. In many cases, RAID-5 (regardless of implementation) is _not_ fast enough, so I use RAID-10.
how you can plug 1.5TB into machine? and the only good kernel support is for 3ware (at least 2-3 years ago). that simple.
Hmmm, I thought RAIDCore's solution was integrated with LVM/MD? And they _do_ have hot-plug last time I checked.
Just seems like a massive waste of the ASIC.