Re: Hard drive RPM
On Fri, 21 Sep 2007 03:41:24 pm Norberto Meijome wrote:
On Thu, 20 Sep 2007 19:35:28 +0200 (CEST)
Wojciech Puchar [EMAIL PROTECTED] wrote:
but we are talking about disk capacity. filesystem is just kind of data
on disk, you may access disk without it like my video stream server.
actually only 1GB of each disk is allocated for filesystem (mirror+stripe
on 8 disks, giving 4GB for / partition), everything else simply contains
movies, with catalog as file on / partition.
OP was complaining he/she could only access a smaller % of his disk after
formatting it. so i think the effect of formatting also goes to answering
the OP.
_
{Beto|Norberto|Numard} Meijome
Liberty is not a means to a higher political end. It is itself the highest
political end... liberty is the only object which benefits all alike, and
provokes no sincere opposition... The danger is not that a particular class
is unfit to to govern. Every class is unfit to govern... Power tends to
corrupt, and absolute power corrupts absolutely. Lord Acton
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wet. Reading disclaimers makes you go blind. Writing them is worse. You
have been Warned.
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When you format a disk a percentage of the disk is reserved for a map so your
file can be found.
On a UFS it is called the SUPER BLOCKS a master and at least one slave.
Typically these blocks will take up to 8% or there abouts of the disk.
BTW I am not shouting when SUPER BLOCKS' that's how it's written.
In a root shell type fsck and watch the screen.
For more info dig into you docs usually /share/doc or usr/doc there where some
really good docs on the UFS.
John
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Re: Hard drive RPM
John Andrewartha wrote: When you format a disk a percentage of the disk is reserved for a map so your file can be found. On a UFS it is called the SUPER BLOCKS a master and at least one slave. Typically these blocks will take up to 8% or there abouts of the disk. BTW I am not shouting when SUPER BLOCKS' that's how it's written. In a root shell type fsck and watch the screen. For more info dig into you docs usually /share/doc or usr/doc there where some really good docs on the UFS By default 8% of the disk is also reserved for use by the superuser: this extra space isn't displayed in the Avail column of df, so when the disk is really full (i.e the root user has filled the disk) it will show negative values. The amount of space reserved can be changed using tunefs(8). -- Bruce Cran ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hard drive RPM
not a case of misrepresentations that I have found on network attached hard disk storage devices and Firewire drives. I have one that was expressly advertised on the package to be 120 Gb capacity, and in fact only 111Gb are available for storage. common marketlie: telling capacity not in gigabytes (2^30) but in billions of bytes. in computers giga always meant 2^30 (like mega 2^20 and kilo 2^10) but they found just another place to lie. on all (most) drive there are numbers of sectors written on label. one sector is half a REAL kilobyte, divide it by 2^21 to get gigabyte count. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hard drive RPM
as 120 Gb and actually only has 117 Gb usable capacity. Like 9Gb is enough for several operating systems. 3Gb is even enough for an operating syste Advertised sizes are for unformatted media. Each filesystem will use different no. they use available space (in sectors) but counted in billions of bytes instead of 2^30 bytes ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hard drive RPM
no. they use available space (in sectors) but counted in billions of bytes instead of 2^30 bytes fair enough...but disk's useful capacity will be slightly different after you format it in whatever filesystem you choose with whatever options you choose to format. but we are talking about disk capacity. filesystem is just kind of data on disk, you may access disk without it like my video stream server. actually only 1GB of each disk is allocated for filesystem (mirror+stripe on 8 disks, giving 4GB for / partition), everything else simply contains movies, with catalog as file on / partition. swap partitions are other example but they most often use only small part. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hard drive RPM
On Thu, 20 Sep 2007 09:23:45 +0200 (CEST)
Wojciech Puchar [EMAIL PROTECTED] wrote:
Advertised sizes are for unformatted media. Each filesystem will use
different
no. they use available space (in sectors) but counted in billions of bytes
instead of 2^30 bytes
fair enough...but disk's useful capacity will be slightly
different after you format it in whatever filesystem you choose with whatever
options you choose to format.
_
{Beto|Norberto|Numard} Meijome
You shouldn't verb words.
I speak for myself, not my employer. Contents may be hot. Slippery when wet.
Reading disclaimers makes you go blind. Writing them is worse. You have been
Warned.
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Re: Hard drive RPM
On Thu, 20 Sep 2007 09:22:00 +0200 (CEST) Wojciech Puchar [EMAIL PROTECTED] wrote: not a case of misrepresentations that I have found on network attached hard disk storage devices and Firewire drives. I have one that was expressly advertised on the package to be 120 Gb capacity, and in fact only 111Gb are available for storage. common marketlie: telling capacity not in gigabytes (2^30) but in billions of bytes. in computers giga always meant 2^30 (like mega 2^20 and kilo 2^10) Not really, it's mostly to do with the fact that mechanical and electrical engineers have never really bought into the lazy kludge of using binary approximations for k,M and G. And there's no incentive because of the way tape and disk devices are accessed. It's the same with telecoms too. The sooner the computer industry get it's act together and starts using Ki, Mi Gi the better. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hard drive RPM
On Thu, 20 Sep 2007 19:35:28 +0200 (CEST)
Wojciech Puchar [EMAIL PROTECTED] wrote:
but we are talking about disk capacity. filesystem is just kind of data on
disk, you may access disk without it like my video stream server. actually
only 1GB of each disk is allocated for filesystem (mirror+stripe on 8
disks, giving 4GB for / partition), everything else simply contains
movies, with catalog as file on / partition.
OP was complaining he/she could only access a smaller % of his disk after
formatting it. so i think the effect of formatting also goes to answering the
OP.
_
{Beto|Norberto|Numard} Meijome
Liberty is not a means to a higher political end. It is itself the highest
political end... liberty is the only object which benefits all alike, and
provokes no sincere opposition... The danger is not that a particular class is
unfit to to govern. Every class is unfit to govern... Power tends to corrupt,
and absolute power corrupts absolutely. Lord Acton
I speak for myself, not my employer. Contents may be hot. Slippery when wet.
Reading disclaimers makes you go blind. Writing them is worse. You have been
Warned.
___
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Hard drive RPM
Hello; Is there a utility for measuring the effective RPM of a hard disk? A software tackometer? I have IDE drives, SATA drives, both 7200 and 10,000 RPM, as well as SCSI disks that are supposed to be running at 15k RPM. I noticed that on the hard drive labels, those on the disk case itself do not specifically indicate what speed they are supposed to operate at. The two 10k SATA drives only had labels on the antistatic packaging indicating that they are 10k drives. I would like to verify the speeds of these drives. I am hoping that this is not a case of misrepresentations that I have found on network attached hard disk storage devices and Firewire drives. I have one that was expressly advertised on the package to be 120 Gb capacity, and in fact only 111Gb are available for storage. That is a 9 Gb discrepancy. A Fire wire drive I have is also designated as 120 Gb and actually only has 117 Gb usable capacity. Like 9Gb is enough for several operating systems. 3Gb is even enough for an operating system. Can anyone shed some light on this? (Storage device labeling, and specifically, RPM specs) I would ask the manufacturers but would be suspicious of bias responses. That is what I got from one of them already. Thanks in advance for responses. The hard drives in question are running on FreeBSD systems on homebuilt hardware. All AMD64 processors, ECS, Gigabyte, and ASUS motherboards, Hard drives are Western Digital IDE, SATA, and Seagate SCSI drives. Jeff K ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hard drive RPM
At 07:47 PM 9/19/2007, jekillen wrote: Hello; Is there a utility for measuring the effective RPM of a hard disk? A software tackometer? I have IDE drives, SATA drives, both 7200 and 10,000 RPM, as well as SCSI disks that are supposed to be running at 15k RPM. I noticed that on the hard drive labels, those on the disk case itself do not specifically indicate what speed they are supposed to operate at. The two 10k SATA drives only had labels on the antistatic packaging indicating that they are 10k drives. I would like to verify the speeds of these drives. I am hoping that this is not a case of misrepresentations that I have found on network attached hard disk storage devices and Firewire drives. I have one that was expressly advertised on the package to be 120 Gb capacity, and in fact only 111Gb are available for storage. That is a 9 Gb discrepancy. A Fire wire drive I have is also designated as 120 Gb and actually only has 117 Gb usable capacity. Like 9Gb is enough for several operating systems. 3Gb is even enough for an operating system. Can anyone shed some light on this? (Storage device labeling, and specifically, RPM specs) I would ask the manufacturers but would be suspicious of bias responses. That is what I got from one of them already. Thanks in advance for responses. The hard drives in question are running on FreeBSD systems on homebuilt hardware. All AMD64 processors, ECS, Gigabyte, and ASUS motherboards, Hard drives are Western Digital IDE, SATA, and Seagate SCSI drives. Jeff K Run the manufacturer's diagnostic utility to check the drives speed and performance. Most of these utilities also give you the drive model and serial number as well. Look for a self-booting version that is a cd-rom ISO, these usually run FreeDOS to easily access the hardware from a cd-rom boot image. -Derek ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks transtec Computers for their support. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks transtec Computers for their support. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hard drive RPM
Derek Ragona wrote: Run the manufacturer's diagnostic utility to check the drives speed and performance. Most of these utilities also give you the drive model and serial number as well. Look for a self-booting version that is a cd-rom ISO, these usually run FreeDOS to easily access the hardware from a cd-rom boot image. I'd suggest the Ultimate Boot CD here: http://www.ultimatebootcd.com/ It's a bootable ISO image with all the major disk mfgr's diags and other good stuff, ready to go. -RW ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hard drive RPM
On Sep 19, 2007, at 6:07 PM, Rob wrote: Derek Ragona wrote: Run the manufacturer's diagnostic utility to check the drives speed and performance. Most of these utilities also give you the drive model and serial number as well. Look for a self-booting version that is a cd-rom ISO, these usually run FreeDOS to easily access the hardware from a cd-rom boot image. I'd suggest the Ultimate Boot CD here: http://www.ultimatebootcd.com/ It's a bootable ISO image with all the major disk mfgr's diags and other good stuff, ready to go. -RW Thanks for both these responses. JK ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
RE: Hard drive RPM
As far as the 120gig != 111gig discrepancy, it sounds like the drive manufacturer use 1 gig = 1,000,000,000 bytes instead of 1,073,741,824 bytes for their advertising. It looks better on the box. It gets messy with drive advertisements as there's no required standard for how they advertise a gigabyte, and whether it's formatted or unformatted capacity. I just assume they're advertising unformatted capacity with 1,000,000,000 bytes as a gig, then I'm pleasantly surprised in the end if I have more than I expected. :) Cheers, Brent -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of jekillen Sent: Thursday, 20 September 2007 12:47 p.m. To: FreeBSD Mailing List Subject: Hard drive RPM Hello; I have one that was expressly advertised on the package to be 120 Gb capacity, and in fact only 111Gb are available for storage. That is a 9 Gb discrepancy. A Fire wire drive I have is also designated as 120 Gb and actually only has 117 Gb usable capacity. Like 9Gb is enough for several operating systems. 3Gb is even enough for an operating system. Can anyone shed some light on this? (Storage device labeling, and specifically, RPM specs) I would ask the manufacturers but would be suspicious of bias responses. That is what I got from one of them already. Thanks in advance for responses. The hard drives in question are running on FreeBSD systems on homebuilt hardware. All AMD64 processors, ECS, Gigabyte, and ASUS motherboards, Hard drives are Western Digital IDE, SATA, and Seagate SCSI drives. Jeff K ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hard drive RPM
On Wed, 19 Sep 2007 17:47:19 -0700
jekillen [EMAIL PROTECTED] wrote:
Is there a utility for measuring the effective RPM of a hard disk?
A software tackometer?
not sure, ultimatebootcd , as it has been suggested, may have some answers. For
reference, just get the drive model and get the full specs from the
manufacturer's site.
You can also peruse hardware testing sites such as toms hardware and others for
tests on that particular drive.
I have one that was expressly advertised on the package to be
120 Gb capacity, and in fact only 111Gb are available for storage.
That is a 9 Gb discrepancy. A Fire wire drive I have is also designated
as 120 Gb and actually only has 117 Gb usable capacity.
Like 9Gb is enough for several operating systems. 3Gb is even
enough for an operating syste
Advertised sizes are for unformatted media. Each filesystem will use different
amount of physical resources (sectors in the disk) to hold its metadata, so
that will of course vary. I suppose you can always use the disk in raw ...
using dd or some other clever tool you may devise... :D let me know how it
goes :)
you may be able to increase the amount of available space (of course, depending
on the filesystem used) by modifying the block size, but that will usually
affect the number of total inodes (or equivalent in NTFS / others) available...
man tuning should have a section on this, as well as your filesystem of choice
documentation (eg, man newfs in BSd, man mk* in linux , NTFS docs @ MSDN )
B
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{Beto|Norberto|Numard} Meijome
Peace can only be achieved by understanding.
Albert Einstein
I speak for myself, not my employer. Contents may be hot. Slippery when wet.
Reading disclaimers makes you go blind. Writing them is worse. You have been
Warned.
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