Re: [gentoo-user] Normal disk speed?

2010-10-02 Thread Florian Philipp
Am 02.10.2010 14:44, schrieb Florian Philipp: > Am 02.10.2010 14:11, schrieb Volker Armin Hemmann: >> On Saturday 02 October 2010, Florian Philipp wrote: > [...] >>> >>> Assumptions: >>> >>> 1. Seek time is constant. For HDDs we can take an average value. Of >>> course this doesn't work for tapes.

Re: [gentoo-user] Normal disk speed?

2010-10-02 Thread Florian Philipp
Am 02.10.2010 14:11, schrieb Volker Armin Hemmann: > On Saturday 02 October 2010, Florian Philipp wrote: [...] >> >> Assumptions: >> >> 1. Seek time is constant. For HDDs we can take an average value. Of >> course this doesn't work for tapes. They have a seek time which >> increases linearly with t

Re: [gentoo-user] Normal disk speed?

2010-10-02 Thread Volker Armin Hemmann
On Saturday 02 October 2010, Florian Philipp wrote: > Am 01.10.2010 18:23, schrieb Volker Armin Hemmann: > > On Friday 01 October 2010, Florian Philipp wrote: > >> Am 01.10.2010 03:12, schrieb Adam Carter: > >>> Your harddisk seeks, everything is slow. > >>> > >>> So does that then mean that m

Re: [gentoo-user] Normal disk speed?

2010-10-02 Thread Florian Philipp
Am 01.10.2010 18:23, schrieb Volker Armin Hemmann: > On Friday 01 October 2010, Florian Philipp wrote: >> Am 01.10.2010 03:12, schrieb Adam Carter: >>> Your harddisk seeks, everything is slow. >>> >>> So does that then mean that my options are; >>> 1. Defragment, so there is less seeking >>> 2.

Re: [gentoo-user] Normal disk speed?

2010-10-01 Thread Adam Carter
> > > > 1. Defragment, so there is less seeking > To this end i have found the scripts fragck.pl and defrag at http://forums.gentoo.org/viewtopic-t-429915.html For me; # ./fragck.pl /home/adam/mp3/ 77.6329693554068% non contiguous files, 27.4885523071504 average fragments. Unfortunately defrag d

Re: [gentoo-user] Normal disk speed?

2010-10-01 Thread Volker Armin Hemmann
On Friday 01 October 2010, Florian Philipp wrote: > Am 01.10.2010 03:12, schrieb Adam Carter: > > Your harddisk seeks, everything is slow. > > > > So does that then mean that my options are; > > 1. Defragment, so there is less seeking > > 2. Get an SSD > > > > Since 2 is too expensive for a d

Re: [gentoo-user] Normal disk speed?

2010-10-01 Thread Daniel Troeder
On 10/01/2010 03:12 AM, Adam Carter wrote: > Your harddisk seeks, everything is slow. > > So does that then mean that my options are; > 1. Defragment, so there is less seeking > 2. Get an SSD > > Since 2 is too expensive for a decent size drive, is there anything i > can do about 1 without a

Re: [gentoo-user] Normal disk speed?

2010-10-01 Thread Florian Philipp
Am 01.10.2010 03:12, schrieb Adam Carter: > Your harddisk seeks, everything is slow. > > So does that then mean that my options are; > 1. Defragment, so there is less seeking > 2. Get an SSD > > Since 2 is too expensive for a decent size drive, is there anything i > can do about 1 without a b

Re: [gentoo-user] Normal disk speed?

2010-09-30 Thread Volker Armin Hemmann
On Friday 01 October 2010, Adam Carter wrote: > > Your harddisk seeks, everything is slow. > > > > So does that then mean that my options are; > > 1. Defragment, so there is less seeking > 2. Get an SSD > > Since 2 is too expensive for a decent size drive, is there anything i can > do about 1 wi

Re: [gentoo-user] Normal disk speed?

2010-09-30 Thread Adam Carter
> Your harddisk seeks, everything is slow. > > So does that then mean that my options are; 1. Defragment, so there is less seeking 2. Get an SSD Since 2 is too expensive for a decent size drive, is there anything i can do about 1 without a backup and restore operation? Or will the fragmentation be

Re: [gentoo-user] Normal disk speed?

2010-09-30 Thread Peter Humphrey
On Thursday 30 September 2010 17:50:41 Florian Philipp wrote: > Am 30.09.2010 18:00, schrieb Peter Humphrey: > > On Thursday 30 September 2010 14:10:42 Florian Philipp wrote: > >> An HDD gets slower when you read the inner tracks. The angular > >> velocity is constant (5400 RPM) while the tangenti

Re: [gentoo-user] Normal disk speed?

2010-09-30 Thread Volker Armin Hemmann
On Thursday 30 September 2010, Adam Carter wrote: > Taring my mp3 collection from 2.5in 500MB internal sata drive (sda) to > esata 3.5in 500MB drive (sdb) and it seems slow. In vmstat i can see that > the external drive writes faster than the internal can read (external has > periods of inactivity)

Re: [gentoo-user] Normal disk speed?

2010-09-30 Thread Florian Philipp
Am 30.09.2010 18:00, schrieb Peter Humphrey: > On Thursday 30 September 2010 14:10:42 Florian Philipp wrote: > >> An HDD gets slower when you read the inner tracks. The angular >> velocity is constant (5400 RPM) while the tangential velocity gets >> lower with the radius. > > Are you telling us

Re: [gentoo-user] Normal disk speed?

2010-09-30 Thread Peter Humphrey
On Thursday 30 September 2010 14:10:42 Florian Philipp wrote: > An HDD gets slower when you read the inner tracks. The angular > velocity is constant (5400 RPM) while the tangential velocity gets > lower with the radius. Are you telling us that the length of a stored bit is constant? I'd have t

Re: [gentoo-user] Normal disk speed?

2010-09-30 Thread Florian Philipp
Am Donnerstag 30 September 2010, 12:58:36 schrieb Adam Carter: > Taring my mp3 collection from 2.5in 500MB internal sata drive (sda) to > esata 3.5in 500MB drive (sdb) and it seems slow. In vmstat i can see that > the external drive writes faster than the internal can read (external has > periods o

[gentoo-user] Normal disk speed?

2010-09-30 Thread Adam Carter
Taring my mp3 collection from 2.5in 500MB internal sata drive (sda) to esata 3.5in 500MB drive (sdb) and it seems slow. In vmstat i can see that the external drive writes faster than the internal can read (external has periods of inactivity) # time tar cf /mnt/usbdrive/mp3back.tar mp3/ real10m