Could be a bad lot of drives go into the RAID arrays. The comparison isn't exactly right. Race engines are expected to be rebuilt all the time. Hard drive arrays are supposed to be reliable. Most of the time that reliability means extra redundancy is built into the system in the form of extra drive controllers, parity disks, and hot spares. For certain applications where they nee the highest available read or write speed on a "scratch" disk they may accept a failure.
On Mon, May 21, 2012 at 7:25 AM, Dan Penoff <lwb...@yahoo.com> wrote: > Dunno about that, but to follow up, my SANs are set up with 168 drives > between two controllers each to fill a standard 48U server rack, to give > you an idea of how many drives we're talking about. And that is just one > rack. > > Haven't had but one failure in the last six months. > > Dan > > On May 21, 2012, at 2:12 AM, "Gerry Archer" <arche...@embarqmail.com> > wrote: > > > Could it be that doing physics on drives is far more intense than less > complex applications? A comparison might be race cars near their limits > (physics) versus ordinary cars being driven far less intensely. > > > > From: "OK Don" <okd...@gmail.com> > > > > > >> I haven't seen that either, and we must have thousands of drives by > now. I > >> don't work directly with them anymore, but I'll ask the guys that do > >> tomorrow. > >> > >> On Sun, May 20, 2012 at 5:16 PM, Brian Toscano <brian.tosc...@gmail.com > >wrote: > >> > >>> I haven't seen that either... > >>> > >>> Often the RAID arrays come new with one batch of drives all of the same > >>> make/model and over time the replacements come from different lots. > For > >>> example, a new RAID array may have all Seagate drives, and as they > fail we > >>> may get another make/model as a replacement. > >>> > >>> On Sun, May 20, 2012 at 3:02 PM, Dan Penoff <lwb...@yahoo.com> wrote: > >>> > >>> > Not sure I would agree with the assumption that if one fails the > other > >>> > will be close behind. > >>> > > >>> > One of the pieces of equipment I manage in our data center is one of > a > >>> > number of SANs, which contain literally hundreds of hard drives. I > can > >>> > attest to the fact that they are all from the same manufacturing lot > > and > >>> > that failures, when they do occur, are rare. > >>> > > >>> > I would tend to say the same about our RAIDs and MSAs as well. When > > you > >>> > see a failure you don't start to see other drives in the same lot > fail > >>> > shortly after. > >>> > > >>> > I'll check to see how many drives we have in our larger SANs and > report > >>> > back. I think it's a couple hundred, but I'm not sure of the exact > >>> number. > >>> > > >>> > And I would add that these are all enterprise grade drives, too. > Using > a > >>> > tool called HP-SIM and a component known as RSA, when we do have a > >>> failure > >>> > the device "phones home" and the HP guy is on our doorstep, part in > > hand, > >>> > in under four hours - 24/7, 365. I won't say what we pay for > >>> > this level of service, but it ain't cheap. > >>> > > >>> > Dan > >>> > > >>> > _______________________________________ > >>> > http://www.okiebenz.com > >>> > For new and used parts go to www.okiebenz.com > >>> > To search list archives http://www.okiebenz.com/archive/ > >>> > > >>> > To Unsubscribe or change delivery options go to: > >>> > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >>> > > >>> _______________________________________ > >>> http://www.okiebenz.com > >>> For new and used parts go to www.okiebenz.com > >>> To search list archives http://www.okiebenz.com/archive/ > >>> > >>> To Unsubscribe or change delivery options go to: > >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >>> > >> > >> > >> > >> -- > >> OK Don > >> 2001 ML320 > >> 1992 300D 2.5T > >> 1990 300D 2.5T > >> 1997 Plymouth Grand Voyager > >> _______________________________________ > >> http://www.okiebenz.com > >> For new and used parts go to www.okiebenz.com > >> To search list archives http://www.okiebenz.com/archive/ > >> > >> To Unsubscribe or change delivery options go to: > >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >> > >> > >> ----- > >> No virus found in this message. > >> Checked by AVG - www.avg.com > >> Version: 2012.0.2176 / Virus Database: 2425/5011 - Release Date: > 05/20/12 > > > > > > _______________________________________ > > http://www.okiebenz.com > > For new and used parts go to www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
