Date: Sat, 11 Oct 2003 01:50:20 -0400 From: "Simon" <simon@optinet.com> To: "freebsd-isp@freebsd.org" <freebsd-isp@freebsd.org>, "PsYxAkIaS (FreeBSD)" <freebsd@psyxakias.com> Subject: Re: Harddisk Problem Message-ID: <20031011055022.A5CB543FD7@mx1.FreeBSD.org> In-Reply-To: <001701c38f75$aa4b19e0$dec2fea9@computer>
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Here is why: manufacturers consider 1GB = 1,000,000,000 bytes, so 80gb drive is really 80,000,000,000 / 1024 / 1024 / 1024 = 74.5GB Now, why you get 68 usable space out of 73gb? 8% of usable space is held back by freebsd due to performance issues. You can change this to 0%, but it is not suggested. If you still want to, read man tunefs, option -m -Simon On Sat, 11 Oct 2003 00:29:55 +0300, PsYxAkIaS (FreeBSD) wrote: >Hello, > >We just installed and mounted a 2nd HDD(secondary ide channel) on a Dedicated Server on FreeBSD 4.8 and look what it gives: > >] df >Filesystem 1K-blocks Used Avail Capacity Mounted on >/dev/ad0s1a 2015918 52114 1802532 3% / >/dev/ad0s1f 22479870 16924774 3756708 82% /usr >/dev/ad0s1e 4031950 73418 3635976 2% /var >procfs 4 4 0 100% /proc >/dev/ad2s1e 76958474 4 70801794 0% /drive2 > >] df -h >Filesystem Size Used Avail Capacity Mounted on >/dev/ad0s1a 1.9G 51M 1.7G 3% / >/dev/ad0s1f 21G 16G 3.6G 82% /usr >/dev/ad0s1e 3.8G 72M 3.5G 2% /var >procfs 4.0K 4.0K 0B 100% /proc >/dev/ad2s1e 73G 4.0K 68G 0% /drive2 > >] cat /etc/fstab ># See the fstab(5) manual page for important information on automatic mounts ># of network filesystems before modifying this file. ># ># Device Mountpoint FStype Options Dump Pass# >/dev/ad0s1b none swap sw 0 0 >/dev/ad0s1a / ufs rw 1 1 >/dev/ad0s1f /usr ufs rw 2 2 >/dev/ad0s1e /var ufs rw 2 2 >/dev/acd0c /cdrom cd9660 ro,noauto 0 0 >proc /proc procfs rw 0 0 >/dev/ad2s1e /drive2 ufs rw 2 2 > >The problem is that from 73GB (80gb hdd) it only sees free 68GB. > >How can i check if it has bad sectors? A friend suggested me low-level format but I never done that before under unix. > >Also, do i need to be in single-user (I dont have physical access, only remote root via ssh). > > >Thank you. >_______________________________________________ >freebsd-isp@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-isp >To unsubscribe, send any mail to "freebsd-isp-unsubscribe@freebsd.org" >
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