Lembit Soobik
lembit.dbamail at t-online.de
Mon Jan 28 12:21:08 CST 2008
Remember when you move your RAID controller to a new machine, you got to install the drivers there also, and by the time your system fails, the driverboard will not fit into the new system. Lembit ----- Original Message ----- From: "jwcolby" <jwcolby at colbyconsulting.com> To: "'Discussion of Hardware and Software issues'" <dba-tech at databaseadvisors.com> Sent: Monday, January 28, 2008 6:37 PM Subject: Re: [dba-Tech] Performance in disc partitions >I absolutely agree. The onboard raid will not work the same with a new > motherboard and so all data in the raid array will be lost. > > > John W. Colby > Colby Consulting > www.ColbyConsulting.com > -----Original Message----- > From: dba-tech-bounces at databaseadvisors.com > [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Erwin Craps - > IT > Helps > Sent: Monday, January 28, 2008 11:50 AM > To: Discussion of Hardware and Software issues > Subject: Re: [dba-Tech] Performance in disc partitions > > I personally would never use an onboard raid to store data. > > If U use a removable controller you can swap controller and disks to > another > system when your system is defect. > Doing so you have your data back in a few minutes... > > Since the OS is pretty much system depending, you could use the onboard > raid > only for your OS disk. > > Erwin > > > > > -----Original Message----- > From: dba-tech-bounces at databaseadvisors.com > [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of DJK(John) > Robinson > Sent: Monday, January 28, 2008 5:38 PM > To: 'Discussion of Hardware and Software issues' > Subject: Re: [dba-Tech] Performance in disc partitions > > All my discs seem just fine, and have just been thrashed by PassMark's > Performance Test. HD Tune (v2.54) never gets to the stage of looking at > them, as far as I can tell. (Tried re-installing: no difference.) Maybe > another day, another system. > > Thanks anyway > John > > > -----Original Message----- > From: dba-tech-bounces at databaseadvisors.com > [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Erwin Craps > - IT > Helps > Sent: 28 January 2008 15:47 > To: Discussion of Hardware and Software issues > Subject: Re: [dba-Tech] Performance in disc partitions > > > Hummm, never had any problem with HD Tune on any system I ever used it. > > Maybe you have a disk prob? > > -----Original Message----- > From: dba-tech-bounces at databaseadvisors.com > [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of DJK(John) > Robinson > Sent: Monday, January 28, 2008 3:08 PM > To: 'Discussion of Hardware and Software issues' > Subject: Re: [dba-Tech] Performance in disc partitions > > Hi Erwin > > I tried HDtune, but it spends most of its time Not Responding so I've > binned > it. May be something to do with my system, of course. > > John > > > -----Original Message----- > From: dba-tech-bounces at databaseadvisors.com > [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Erwin Craps > - IT > Helps > Sent: 28 January 2008 10:18 > To: Discussion of Hardware and Software issues > Subject: Re: [dba-Tech] Performance in disc partitions > > > The edge of the disk also means lower access times. > I don't know why because RPM is the same at the inner as outer side of the > disk. > > I know that CD drives change their RPM speed depending how far they are on > the inner and outer side of a cd so the laser can keep up reading the > data, > don't know if that is true for HD. That could be an explanation for lower > access times, because it takes longer for the data to pass the head. > > > You can check http://www.hdtune.com/ it's a free disk performance check, > it > will show you the transfer rate / access time for your disk over the whole > disk. > > Erwin > > > > > -----Original Message----- > From: dba-tech-bounces at databaseadvisors.com > [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of DJK(John) > Robinson > Sent: Monday, January 28, 2008 10:34 AM > To: 'Discussion of Hardware and Software issues' > Subject: Re: [dba-Tech] Performance in disc partitions > > Thanks, John. That would suggest higher transfer rates nearer the edge, > with some cylinders holding more than others. > > Has anyone got any good links to this sort of stuff? > > Oh, and of course I'm still interested in knowing whether the 'first' > partition is nearer the edge or the spindle... > > John > > > -----Original Message----- > From: dba-tech-bounces at databaseadvisors.com > [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of jwcolby > Sent: 28 January 2008 00:57 > To: 'Discussion of Hardware and Software issues' > Subject: Re: [dba-Tech] Performance in disc partitions > > > IIRC, the disk controller speeds up the writes as the tracks move outwards > towards the edge of the platter. IOW there is more surface area on the > outer tracks so they just bump up the waveform to allow more data to be > written in that larger surface area. When thought of from that > perspective, > the outer tracks hold more data / track and so may require less head > movement. I have no idea whether the first volume is on the inner tracks > or > the outer tracks. > > > John W. Colby > Colby Consulting > www.ColbyConsulting.com > -----Original Message----- > From: dba-tech-bounces at databaseadvisors.com > [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of DJK(John) > Robinson > Sent: Sunday, January 27, 2008 7:47 PM > To: 'Discussion of Hardware and Software issues' > Subject: [dba-Tech] Performance in disc partitions > > I am about to partition a new disc. One partition will be very active in > terms of reads and writes, another almost dormant. > > Is there any advantage in performance terms in having the active partition > as the 'first' one on the disc? Or the last one? > > It's a long time since I was involved in disc layout at a low level, and > I'm > wondering whether 'cylinders' these days are still all the same size, with > the data near the edge of the platter just more spread out than that near > the spindle - or not? > > TIA > John > > > _______________________________________________ > 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 > > > _______________________________________________ > 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 > > > _______________________________________________ > 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 > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.516 / Virus Database: 269.19.13/1246 - Release Date: > 27.01.2008 18:39 > >