Erwin Craps
Erwin.Craps at ithelps.be
Fri Aug 29 01:53:59 CDT 2003
Uptime is the key word in RAID. It has speed avantages AND dis-advantages. RAID5 is cheap (per GB) but slow in writing due to the parity bit calculation. It is said not to use RAID 5 for SQL databases... Ghosting al soud good, but in my experience unusable for on-line equipment. You can not put a ghost back to a server running SQL server or a website (active) or a mailsever. You would need both a ghost and a current backup (off or on-line). My self I have dayly dealine at 8h30 in the morning seven days a week. To be able to fast recuperate from a crash I take 5 backups a day.. 1 full (on-line), 2 partial, 2 database only. Of course this is for my server. If you don't have an on-line system (no mail server, database server, no active website). I supose you could use a ghost. A ghost could be a solution to get yur clean working system back working again. But this principle is also covered by a good backup software. Disaster Recovery is the name (the principle) Just boot from the cd and your backup will be compleetly restored... But then you need a fast tape streamer depeding on how fast you want to be back on-line... However eritas now (i goto that but no tested yet) has also an option tu use disks now for backups. Erwin Erwin Craps Zaakvoerder www.ithelps.be/jonathan This E-mail is confidential, may be legally privileged, and is for the intended recipient only. Access, disclosure, copying, distribution, or reliance on any of it by anyone else is prohibited and may be a criminal offence. Please delete if obtained in error and E-mail confirmation to the sender. IT Helps - I.T. Help Center *** Box Office Belgium & Luxembourg www.ithelps.be * www.boxoffice.be * www.stadleuven.be IT Helps bvba* ** Mercatorpad 3 ** 3000 Leuven IT Helps * Phone: +32 16 296 404 * Fax: +32 16 296 405 E-mail: Info at ithelps.be Box Office ** Fax: +32 16 296 406 ** Box Office E-mail: Staff at boxoffice.be -----Oorspronkelijk bericht----- Van: Tortise at Paradise [mailto:tortise at paradise.net.nz] Verzonden: donderdag 28 augustus 2003 23:04 Aan: Discussion of Hardware and Software issues Onderwerp: Re: [dba-Tech] Security measures RAID I agree. I must be really poor at explaining. The third drive is outside the machine and in this scenario would not receive the SP4. If the two mirrored drives fell over they can be removed and the 3rd run initially on its own...without the SP4 on it. I understood the option for RAID were security or speed. I was not aware stability was related, presuming the RAID setup is "proper". I promote it here solely for security, and for the integrated set of benefits one gets. Certainly one would need, to retrieve a running disc, to plug the disc back into the RAID controller. (Same model, brand may work but there would be an element of risk in that) Forget trying to run the setup disc on a standard IDE controller. And yes I use the xcopy also. My brother wrote a fancy backup script in vb and its clever (http://www.cheqsoft.com/other.html) but I find plain old xcopy does the job. I prefer to see it as smart and quick, but not "cheap". Also there are more options for doing backups to say a day of the week etc. HDD are fast, economic and large. Smart! Kind regards, David Engines2Go - Now THAT's a Search Engine! Automated major search engine manager Makes searching quicker and easier - Have you tried it? http://www.engines2go.com/ http://www.cheqsoft.com/ The home of Clipboard Express, MP3 Detective, TimesOwn and Break Reminder. ----- Original Message ----- From: "Francisco H Tapia" <my.lists at verizon.net> To: "Discussion of Hardware and Software issues" <dba-tech at databaseadvisors.com> Sent: Friday, August 29, 2003 5:21 AM Subject: Re: [dba-Tech] Security measures Raid IDE is more for fail safe rather than stability... by that I mean.. you install a patch lets say SP4 on win2k, and your machine begins to act quirky, well your mirrored drives are gonna have that install of sp4... as opposed to having mirrored or ghosted the drive prior to the sp4 install. -- -Francisco Tortise at Paradise wrote: > For what its worth a strategy I have employed is to use RAID IDE > (mirroring) drives, use 3 drives, make two of them cold swappable, > and at intervals swap the drives and copy the image to the "new" > drive" Should all hell break loose you reinstall the old drive, and > update and run off that one, and resume copying from there. It is very > cost effective, although not tested in the sense of being really > needed. Still I like these things happening on my terms. LOL Kind > regards, David Engines2Go - Now THAT's a Search Engine! > Automated major search engine manager > Makes searching quicker and easier - Have you tried it? > http://www.engines2go.com/ > http://www.cheqsoft.com/ The home of Clipboard Express, MP3 Detective, TimesOwn and Break Reminder. > ----- Original Message ----- > From: "Steven W. Erbach" <serbach at new.rr.com> > To: "Discussion of Hardware and Software issues" <dba-tech at databaseadvisors.com> > Sent: Thursday, August 28, 2003 11:13 AM > Subject: Re: [dba-Tech] Security measures > > > Francisco, > > >>>It's quite a bit > > easier this way cuz you can just take your corrupted OS dump the image > on it placing you back before the patch was installed. << > > And that's where I thought a cloned drive would be simpler yet. > Granted, you don't have multiple image backups. But for ease of > get-up-and-go, a cloned drive wins hands down, I'd say. > > Thanks for the extra details about OE. Very persuasive arguments. > > Regards, > _______________________________________________ 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