Lembit Soobik
lembit.dbamail at t-online.de
Sat Feb 17 06:11:55 CST 2007
Hi Mark, what I dont see yet is, why striped? why not simply mirrored Raid 1? that should be easy with your 40 gig, even if you need 400 gig. I have a machine with mirrored 2x 280 G IDE and have recently added a SATA drive. each time I turn the machine off, it makes an Image of the C-partition (Windows and programs) to one partition of the SATA. in case both IDEs would fail I can put the image onto the SATA first partition and boot from that. The data backup is taken care of with a different procedure. Lembit ----- Original Message ----- From: "Mark Breen" <marklbreen at gmail.com> To: "Discussion of Hardware and Software issues" <dba-tech at databaseadvisors.com> Sent: Saturday, February 17, 2007 12:12 PM Subject: Re: [dba-Tech] Building a network storage device > Hello Lembit and Gustav, > > Nice to see you all. > > Gustav, I may try this *nix option, if nothing else, it will give me an > excuse to learn a little about this new thing named Linux ;) > > Lembit, The data in question is mirrored and striped, so I should not > really > loose the data, but it is down time that I am thinking about. Also, as > John > Colby was mentioning, I would not feel 100% confident that I could plug a > raid controller into another machine and actually get back the stripe. > And > even if some one assured me that I would, what if the raid controller goes > down :( > > So, my thought process was that unless you really have a fully redundant, > and mirrored, machine, you still have some risk of losing production time > and to lesser extent, losing some live data. It is not the data that I > really worry about, it is the loss of production time. > > I will look up the thread Linux file server backup now and see what is > there. > > Thanks all, > > Mark > > > On 16/02/07, Lembit Soobik <lembit.dbamail at t-online.de> wrote: >> >> Mark, >> If I understand correctly, you are worried about 40 GB data. >> have you considered to put in a SATA Raid 1 and in case the PC goes down >> jsut plug these two HDs into a different machine. >> I think the bigger issue is to have all the software transferred to the >> other machine (or keep it on a second machine up to date), but just 40 GB >> is >> no problem. >> >> Lembit >> >> ----- Original Message ----- >> From: "Mark Breen" <marklbreen at gmail.com> >> To: "Discussion of Hardware and Software issues" >> <dba-tech at databaseadvisors.com> >> Sent: Friday, February 16, 2007 3:02 PM >> Subject: Re: [dba-Tech] Building a network storage device >> >> >> > Hello John Colby, >> > >> > This is something that keeps me awake at night also, i.e., what to do >> > if >> > the >> > motherboard goes down. >> > >> > I have a machine, with Raid 10, so I have stripe performance and raid >> > redundancy but if the motherboard (or PSU for that matter) does down, I >> > would have down time. >> > >> > So, in my mind, the only real choice is to have some kind of clustered >> > machines, but this is something that I have only looked at, I have not >> > actually gotton around to creating a cluster of machines. And I wonder >> > what >> > the performance would be like on such a system. Plus to build a >> > cluster >> > on >> > Windows environment, you have to use W2k3 Ent edition. I have the >> > software >> > but licences only to use them in a dev environment, not real production >> > environment. >> > >> > I would not like to assume that if I pulled my raid controller out and >> put >> > it in another machine, that it would work, in fact, I sort of assume >> that >> > it >> > would not work. >> > >> > In summary, I have, redundancy with the disks, and backups of the data, >> > but >> > no redundancy with the machine itself. >> > >> > The data that I need to backup is about 40 GB, so what I am considering >> is >> > 1) continuing to do my mag tape backups nightly and taking fridays off >> > site >> > in case of fire or theft or flooding etc. >> > >> > Then I am thinking of writing a small script to copy the 40 gb nightly >> to >> > another server, I would probably have an A and B folder on the live >> backup >> > server, so that when it is overwriting folder A, B is still nice and >> safe. >> > Additionally, of the main file server ever goes down, I do not have to >> > panic >> > about the last tape backup possibly having failed. >> > >> > In summary, the real secret is to get redundancy of the raid array, I >> > am >> > looking forward to hearing if you acheive this. >> > >> > Finally, as I write this, I have just remembered something. The file >> > server >> > that I am using actually had the raid controller on board, so that >> > means >> > that if the motherboard goes down, I am 99% likely to loose the >> array..., >> > now I will not sleep. >> > >> > Let me know how you get on the with controller pluging and playing in >> > another machine, >> > >> > Mark >> > _______________________________________________ >> > dba-Tech mailing list >> > dba-Tech at databaseadvisors.com >> > http://databaseadvisors.com/mailman/listinfo/dba-tech >> > Website: http://www.databaseadvisors.com >> >> _______________________________________________ >> dba-Tech mailing list >> dba-Tech at databaseadvisors.com >> http://databaseadvisors.com/mailman/listinfo/dba-tech >> Website: http://www.databaseadvisors.com >> > _______________________________________________ > dba-Tech mailing list > dba-Tech at databaseadvisors.com > http://databaseadvisors.com/mailman/listinfo/dba-tech > Website: http://www.databaseadvisors.com