Date: Wed, 15 Mar 2017 10:13:24 +0100 From: Polytropon <freebsd@edvax.de> To: Israel Gelpi <igelpi@trioscs.com> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: LABEL (The FreeBSD Disklabel Editor) Message-ID: <20170315101324.484d5780.freebsd@edvax.de> In-Reply-To: <BN6PR02MB272290CACFAD3F604CB0924EC8240@BN6PR02MB2722.namprd02.prod.outlook.com> References: <BN6PR02MB272290CACFAD3F604CB0924EC8240@BN6PR02MB2722.namprd02.prod.outlook.com>
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On Tue, 14 Mar 2017 21:09:17 +0000, Israel Gelpi wrote: > Hello Sir, I had a SUN enterprise which I tested using a > HDD diagnostics software called SCSI Tool-Box Suite. After > testing I wiped the drive and mistakenly erased the Disk > Label making the drive unusable (the operating system would > not "mount'). Could you advise me on the how, I could > restore/repair the Disk Label and to proper wipe a SUN > without erasing the disk label. If you intend to mount the disk again on Solaris (default Sun operating system), you'd need to do two things: 1. create a label on the disk (disklabel or bsdlabel) 2. initialize the file UFS system (newfs) Without those two (!) things, you won't be able to mount it. (NB: The following explanations are FreeBSD-specific.) The FreeBSD installer does all those things, but you can do it manually, too: Boot FreeBSD from CD or USB in live mode (shell access), then issue the required commands for the disk, for example if /dev/da0 is the disk in question (without testing, just from my memory): # bsdlabel -w /dev/da0 # bsdlabel -e /dev/da0 in the editor, change type for partition "a": "unused" -> "4.2BSD", then save & exit # newfs /dev/da0 If you need additional boot code on that disk (only required if it should be a boot disk), write the boot code as well. The same applies for newfs options you might want to add. Now the disk /dev/da0 can be mounted. It contains a disklabel with one BSD partition covering the whole disk, often called "dedicated" because there i You can find detailed information in "man bsdlabel" and "man newfs". Additional online documentation can be found here: https://www.freebsd.org/doc/handbook/disks-adding.html https://www.freebsd.org/doc/faq/disks.html http://www.wonkity.com/~wblock/docs/html/disksetup.html#_the_old_standard_mbr Note that FreeBSD encourages the use of gpart, a tool that can be used both for MBR operations (fdisk + bsdlabel) and GPT operations, but there's nothing wrong in using the "classic tools" for "legacy work". ;-) -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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