Date: Thu, 29 Mar 2001 11:21:46 -0500 From: Leonard Zettel <zettel@acm.org> To: freebsd-doc@FreeBSD.org Subject: Handbook section 10.3 Message-ID: <3AC3611A.F91EAAB0@acm.org>
next in thread | raw e-mail | index | archive | help
This is a multi-part message in MIME format. --------------A754063A452BA564B447E26D Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Based on some recent experience I had as a complete newbie trying to get freeBSD up and running, I am submitting the attached as a suggested revision to FreeBSD Handbook 10.3 Disk naming. Having the added information would have saved me a bit of heartburn. Feel free to regard this as a newbie suggestion, to be accepted, rejected, modified as you see fit. -LenZ- --------------A754063A452BA564B447E26D Content-Type: text/html; charset=us-ascii; name="disks-naming.html" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="disks-naming.html" <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta name="generator" content="HTML Tidy, see www.w3.org"> <title>Disk Naming</title> <meta name="GENERATOR" content= "Modular DocBook HTML Stylesheet Version 1.61 "> <link rel="HOME" title="FreeBSD Handbook" href="index.html"> <link rel="UP" title="Disks" href="disks.html"> <link rel="PREVIOUS" title="BIOS Drive Numbering" href= "disks-bios-numbering.html"> <link rel="NEXT" title="Mounting and Unmounting Filesystems" href="disks-mounting.html"> </head> <body class="SECT1" bgcolor="#FFFFFF" text="#000000" link= "#0000FF" vlink="#840084" alink="#0000FF"> <div class="NAVHEADER"> <table width="100%" border="0" cellpadding="0" cellspacing= "0"> <tr> <th colspan="3" align="center">FreeBSD Handbook</th> </tr> <tr> <td width="10%" align="left" valign="bottom"><a href= "disks-bios-numbering.html">Prev</a></td> <td width="80%" align="center" valign="bottom">Chapter 10. Disks</td> <td width="10%" align="right" valign="bottom"><a href= "disks-mounting.html">Next</a></td> </tr> </table> <hr align="LEFT" width="100%"> </div> <div class="SECT1"> <h1 class="SECT1"><a name="DISKS-NAMING">10.3. Disk Naming</a></h1> <p>Physical drives come in two main flavors, <span class= "ACRONYM">IDE</span>, or <span class="ACRONYM">SCSI</span>; but there are also drives backed by RAID controllers, flash memory, and so forth. Since these behave quite differently, they have their own drivers and devices.</p> <div class="TABLE"> <a name="DISK-NAMING-PHYSICAL-TABLE"></a> <p><b>Table 10-1. Physical Disk Naming Conventions</b></p> <table border="1" class="CALSTABLE"> <thead> <tr> <th align="LEFT" valign="TOP">Drive type</th> <th align="LEFT" valign="TOP">Drive device name</th> </tr> </thead> <tbody> <tr> <td align="LEFT" valign="TOP">IDE hard drives</td> <td align="LEFT" valign="TOP"><tt class= "LITERAL">ad in 4.0-RELEASE, </tt>ad0 is the master drive of the first controller. ad1 is the slave of the first controller. ad2 is the master of the second controller, ad3 the slave. <tt class= "LITERAL">wd</tt> before 4.0-RELEASE.</td> </tr> <tr> <td align="LEFT" valign="TOP">IDE CDROM drives</td> <td align="LEFT" valign="TOP"><tt class= "LITERAL">acd</tt> from 3.1-RELEASE, <tt class= "LITERAL">wcd</tt> before 4.0-RELEASE.</td> </tr> <tr> <td align="LEFT" valign="TOP">SCSI hard drives</td> <td align="LEFT" valign="TOP"><tt class= "LITERAL">da</tt> from 3.0-RELEASE, <tt class= "LITERAL">sd</tt> before 3.0-RELEASE.</td> </tr> <tr> <td align="LEFT" valign="TOP">SCSI CDROM drives</td> <td align="LEFT" valign="TOP"><tt class= "LITERAL">cd</tt></td> </tr> <tr> <td align="LEFT" valign="TOP">Assorted non-standard CDROM drives</td> <td align="LEFT" valign="TOP"><tt class= "LITERAL">mcd</tt> for Mitsumi CD-ROM, <tt class= "LITERAL">scd</tt> for Sony CD-ROM, <tt class= "LITERAL">matcd</tt> for Matsushita/Panasonic CD-ROM</td> </tr> <tr> <td align="LEFT" valign="TOP">Floppy drives</td> <td align="LEFT" valign="TOP"><tt class= "LITERAL">fd</tt></td> </tr> <tr> <td align="LEFT" valign="TOP">SCSI tape drives</td> <td align="LEFT" valign="TOP"><tt class= "LITERAL">sa</tt> from 3.0-RELEASE, <tt class= "LITERAL">st</tt> before 3.0-RELEASE.</td> </tr> <tr> <td align="LEFT" valign="TOP">IDE tape drives</td> <td align="LEFT" valign="TOP"><tt class= "LITERAL">ast</tt> from 4.0-RELEASE, <tt class= "LITERAL">wst</tt> before 4.0-RELEASE.</td> </tr> <tr> <td align="LEFT" valign="TOP">Flash drives</td> <td align="LEFT" valign="TOP"><tt class= "LITERAL">fla</tt> for DiskOnChip Flash device from 3.3-RELEASE.</td> </tr> <tr> <td align="LEFT" valign="TOP">RAID drives</td> <td align="LEFT" valign="TOP"><tt class= "LITERAL">myxd</tt> for Mylex, and <tt class= "LITERAL">amrd</tt> for AMI MegaRAID, <tt class= "LITERAL">idad</tt> for Compaq Smart RAID. from 4.0-RELEASE. <tt class="LITERAL">id</tt> between 3.2-RELEASE and 4.0-RELEASE.</td> </tr> </tbody> </table> </div> <div class="SECT2"> <h2 class="SECT2"><a name="AEN6603">10.3.1. Slices and Partitions</a></h2> <p>Physical disks usually contain <i class= "FIRSTTERM">slices</i>, unless they are ``dangerously dedicated''. Slice numbers follow the device name, prefixed with an <tt class="LITERAL">s</tt>: ``da0<i class= "EMPHASIS">s1</i>''.</p> <p>Slices, ``dangerously dedicated'' physical drives, and other drives contain <i class="FIRSTTERM">partitions</i>, which represented as letters from <tt class= "LITERAL">a</tt> to <tt class="LITERAL">h</tt>. <tt class= "LITERAL">b</tt> is reserved for swap partitions, and <tt class="LITERAL">c</tt> is an unused partition the size of the entire slice or drive. This is explained in <a href= "disks-adding.html">Section 10.5</a>>.</p> </div> </div> <div class="NAVFOOTER"> <hr align="LEFT" width="100%"> <table width="100%" border="0" cellpadding="0" cellspacing= "0"> <tr> <td width="33%" align="left" valign="top"><a href= "disks-bios-numbering.html">Prev</a></td> <td width="34%" align="center" valign="top"><a href= "index.html">Home</a></td> <td width="33%" align="right" valign="top"><a href= "disks-mounting.html">Next</a></td> </tr> <tr> <td width="33%" align="left" valign="top">BIOS Drive Numbering</td> <td width="34%" align="center" valign="top"><a href= "disks.html">Up</a></td> <td width="33%" align="right" valign="top">Mounting and Unmounting Filesystems</td> </tr> </table> </div> <p align="center"><small>This, and other documents, can be downloaded from <a href= "ftp://ftp.FreeBSD.org/pub/FreeBSD/doc">ftp.FreeBSD.org/pub/FreeBSD/doc/</a>.</small></p> <p align="center"><small>For questions about FreeBSD, read the <a href="http://www.freebsd.org/docs.html">documentation</a> before contacting <<a href= "mailto:questions@FreeBSD.org">questions@FreeBSD.org</a>>.<br> For questions about this documentation, e-mail <<a href= "mailto:doc@FreeBSD.org">doc@FreeBSD.org</a>>.</small></p> </body> </html> --------------A754063A452BA564B447E26D-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-doc" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3AC3611A.F91EAAB0>