Re: 200gb hard drive?
On Sat, 22 Nov 2003 13:47:40 -0500 Robert Huff <[EMAIL PROTECTED]> probably wrote: > > Sergey 'DoubleF' Zaharchenko writes: > > > BTW what's the point in printing 3 numbers that match? If they match, > > then one of them is redundant:) > > And if they don't? > Then they all carry some information. If a+b=c, then you don't have to print out a,b and c, since c carries no information. But the numbers in df output aren't supposed to match (because of the reserved space), so they are all printed. -- DoubleF Honk if you love peace and quiet. pgp0.pgp Description: PGP signature
Re: 200gb hard drive?
Sergey 'DoubleF' Zaharchenko writes: > BTW what's the point in printing 3 numbers that match? If they match, > then one of them is redundant:) And if they don't? Robert Huff ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: 200gb hard drive?
On Fri, 21 Nov 2003 15:05:51 -0500 Robert Huff <[EMAIL PROTECTED]> probably wrote: > > Sergey 'DoubleF' Zaharchenko writes: > > > > A better question for the list: did something change in "df" > > > sometime in 5.x? Because the numbers in the three columns used to > > > match (modulo rounding error); if you dipped into the reserve pool > > > > No, it didn't. 4.8-RELEASE: > > Now that's interesting. I jumped from 4.7 to 5.0; wonder if > the change happened afterwards. Time to take my 4.4 boot diskette from the shelf. # df -h FilesystemSize Used Avail Capacity Mounted on /dev/md0c 2.3M 2.0M 320K87%/ procfs4.0K 4.0K 0B 100%/proc /dev/ad1s2a97M45M44M51%/mnt So no, they didn't add up even in 4.4. I don't think 4.7's df was something extraordinary. BTW what's the point in printing 3 numbers that match? If they match, then one of them is redundant:) > > Robert Huff > > > ___ > [EMAIL PROTECTED] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "[EMAIL PROTECTED]" > -- DoubleF "Biology is the only science in which multiplication means the same thing as division." pgp0.pgp Description: PGP signature
Re: 200gb hard drive?
Sergey 'DoubleF' Zaharchenko writes: > >A better question for the list: did something change in "df" > > sometime in 5.x? Because the numbers in the three columns used to > > match (modulo rounding error); if you dipped into the reserve pool > > No, it didn't. 4.8-RELEASE: Now that's interesting. I jumped from 4.7 to 5.0; wonder if the change happened afterwards. Robert Huff ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: 200gb hard drive?
Omer Faruk Sen writes: > Thanks for all answers. That space problem was bothering me all > the times and I have learnt the reason for space loss. By the way > I admit that I have to make more search on google before sending > that to here. > > But it can be very nice that this information to be added on > handbook. Or is it in handbook already? I think it's in the FAQ. A better question for the list: did something change in "df" sometime in 5.x? Because the numbers in the three columns used to match (modulo rounding error); if you dipped into the reserve pool it showed as negative free space available - a _very_ obvious visual marker something was wrong. (I'd been wondering why I get this: huff@> df -h FilesystemSize Used Avail Capacity Mounted on /dev/da0s1a 484M 111M 334M25%/ devfs 1.0K 1.0K 0B 100%/dev /dev/da1s1d44G19G22G47%/usr /dev/da0s1d 989M38M 872M 4%/var and wondering whether it foretold some larger problem. ) Robert Huff ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: 200gb hard drive?
Thanks for all answers. That space problem was bothering me all the times and I have learnt the reason for space loss. By the way I admit that I have to make more search on google before sending that to here. But it can be very nice that this information to be added on handbook. Or is it in handbook already? Frank Knobbe writes: On Thu, 2003-11-20 at 14:56, Derrick Ryalls wrote: When manufacturers talk about drive size, they use base 10. When computer report drive size, they use base 2. So, if you divide 200,000,000 bytes by ( 1024 * 1024 ), you get roughly 190gig in binary, so off the bat you lose 10gigs of space due to marketspeak translation. That's not always the case. I have seen disk manufacturers use something like base 20 :) In other words, they advertise a 160 GB drive which only holds 120 GB. I hope they get sued for this crap talk about deceptive marketing...geesh... Frank ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
RE: 200gb hard drive?
On Thu, 2003-11-20 at 14:56, Derrick Ryalls wrote: > When manufacturers talk about drive size, they use base 10. When computer > report drive size, they use base 2. So, if you divide 200,000,000 bytes by > ( 1024 * 1024 ), you get roughly 190gig in binary, so off the bat you lose > 10gigs of space due to marketspeak translation. That's not always the case. I have seen disk manufacturers use something like base 20 :) In other words, they advertise a 160 GB drive which only holds 120 GB. I hope they get sued for this crap talk about deceptive marketing...geesh... Frank signature.asc Description: This is a digitally signed message part
Re: 200gb hard drive?
> > Omer, this is because a percentage of your disk space is reserved > automatically by FreeBSD. I believe that it automatically reserves 8% of > your disk space. You can adjust this by using 'tunefs'. Try 'man tunefs' to > find out how to use tunefs. Partly true for the second part of the question - eg why it says there is 183G but 169G is reported as 0% free. But, the first part is because manufactures advertise their disk sizes in decimal where a GBYTE - 1,000,000,000 bytes, but the system uses more common convention where the most convenient binary equivalent is used to report sizes. In this, 1 KByte = 1024 bytes, 1 MByte = 1,048,576 bytes and 1 GByte = 1,073,741,824 bytes. So, the manufacturers advertising is only 93.1323 % of what you think you will be getting according to the way the system reports it. For 200 GBytes, that amounts to 186.26 GBytes. That gets a little further reduced bye "formatting" (fdisk, disklabel, newfs work) leaving about 183 GBytes of disk if reported according to the more common binary equivalent method. Then the system reserves some for various real and historical reasons when it interprets how much a non-root account can write to disk. I think the other responder is correct that the default is 8.0 %. So, take out 8 % from 183 GBytes and you get about 169 GBytes. It is all there if you know the system and the arithmetic. The biggest confusion comes in the manufacturers reporting in decimal because it makes the disks they are selling sound bigger. Of course, there are some who swear that is the correct way to define disk size. But, I think that since the normal usage is by nearest binary equivalent K-s, M-s and G-s, it is somewhat disengenuous for manufacturers to insist on doing it by decimal. This has been discussed so many times in the Email list, that if one does a little searching, it should be impossible to avoid finding this type of information. So, do a little searching. In this case Google and pretty much any search engine out there can be your friends. jerry > David van Geyn > - Original Message - > From: "Omer Faruk Sen" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Thursday, November 20, 2003 3:23 PM > Subject: 200gb hard drive? > > > Hi > > > > I have installed a new hard drive to my FreeBSD system. Hard drive is > 200gb > > but > > when I fdisk and disklabel the output of "df -h" is something like that: > > > > /dev/ad1s1e 183G 2.0K 169G 0%/disk2 > > > > Here as you can see I can only use 169GB of it. Bios has seen my harddrive > > as 190GB also dmesg output is like that: > > > > ad1: 190782MB [387621/16/63] at ata0-slave UDMA100 > > > > My question is what happened to 190-169 gb or maybe after some filesystem > > information reservation what happened to 183-169 gb? > > > > By the way I have used default newfs parameters -b 16384 -f 2048. I don't > > know if that helps... > > > > REGARDS... > > ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
RE: 200gb hard drive?
> I have installed a new hard drive to my FreeBSD system. Hard > drive is 200gb > but > when I fdisk and disklabel the output of "df -h" is something > like that: > > /dev/ad1s1e 183G 2.0K 169G 0%/disk2 > > Here as you can see I can only use 169GB of it. Bios has seen > my harddrive > as 190GB also dmesg output is like that: > > ad1: 190782MB [387621/16/63] at > ata0-slave UDMA100 > > My question is what happened to 190-169 gb or maybe after > some filesystem > information reservation what happened to 183-169 gb? > > By the way I have used default newfs parameters -b 16384 -f > 2048. I don't > know if that helps... > When manufacturers talk about drive size, they use base 10. When computer report drive size, they use base 2. So, if you divide 200,000,000 bytes by ( 1024 * 1024 ), you get roughly 190gig in binary, so off the bat you lose 10gigs of space due to marketspeak translation. FreeBSD reserves 8% for something (I forget what), so that brings it down to 174gig. As for the last 5gig, dunno, sorry. ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: 200gb hard drive?
Omer Faruk Sen wrote: Hi I have installed a new hard drive to my FreeBSD system. Hard drive is 200gb but when I fdisk and disklabel the output of "df -h" is something like that: /dev/ad1s1e 183G 2.0K 169G 0%/disk2 Here as you can see I can only use 169GB of it. Bios has seen my harddrive as 190GB also dmesg output is like that: ad1: 190782MB [387621/16/63] at ata0-slave UDMA100 My question is what happened to 190-169 gb or maybe after some filesystem information reservation what happened to 183-169 gb? By the way I have used default newfs parameters -b 16384 -f 2048. I don't know if that helps... REGARDS... ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]" Wd uses an old system to measure drive capicity. For a wd drive 200gb= 200,000,000,000 bytes, but to any person fimilar with binary and decimal numbers there 200gb=186.26gb~2^37.54bytes. You also have to have a file system, with takes up more room with more space to map. ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: 200gb hard drive?
Omer, this is because a percentage of your disk space is reserved automatically by FreeBSD. I believe that it automatically reserves 8% of your disk space. You can adjust this by using 'tunefs'. Try 'man tunefs' to find out how to use tunefs. David van Geyn - Original Message - From: "Omer Faruk Sen" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 20, 2003 3:23 PM Subject: 200gb hard drive? > Hi > > I have installed a new hard drive to my FreeBSD system. Hard drive is 200gb > but > when I fdisk and disklabel the output of "df -h" is something like that: > > /dev/ad1s1e 183G 2.0K 169G 0%/disk2 > > Here as you can see I can only use 169GB of it. Bios has seen my harddrive > as 190GB also dmesg output is like that: > > ad1: 190782MB [387621/16/63] at ata0-slave UDMA100 > > My question is what happened to 190-169 gb or maybe after some filesystem > information reservation what happened to 183-169 gb? > > By the way I have used default newfs parameters -b 16384 -f 2048. I don't > know if that helps... > > REGARDS... > > ___ > [EMAIL PROTECTED] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "[EMAIL PROTECTED]" > ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
