<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:v = "urn:schemas-microsoft-com:vml" xmlns:o = "urn:schemas-microsoft-com:office:office" xmlns:w = "urn:schemas-microsoft-com:office:word" xmlns:m = "http://schemas.microsoft.com/office/2004/12/omml"><HEAD> <META http-equiv=Content-Type content="text/html; charset=us-ascii"> <META content="MSHTML 6.00.2800.1601" name=GENERATOR> <STYLE>@font-face { font-family: Cambria Math; } @font-face { font-family: Calibri; } @page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.0in 1.0in 1.0in; } P.MsoNormal { FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif" } LI.MsoNormal { FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif" } DIV.MsoNormal { FONT-SIZE: 11pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif" } A:link { COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99 } SPAN.MsoHyperlink { COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99 } A:visited { COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99 } SPAN.MsoHyperlinkFollowed { COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99 } SPAN.EmailStyle17 { COLOR: windowtext; FONT-FAMILY: "Calibri","sans-serif"; mso-style-type: personal-compose } .MsoChpDefault { mso-style-type: export-only } DIV.Section1 { page: Section1 } </STYLE> </HEAD> <BODY lang=EN-US vLink=purple link=blue> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=867144621-12112007>When you format, unless you specify the block size, the default block size is used.</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=867144621-12112007>The default block size is defined based on the size of the logical disk (partition) size that you've created.</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=867144621-12112007>Any disk space left over from the format is listed as unusable (for the block size that's being used) can not be used because it's not a multiple of the block size used to format that logical drive/partition.</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=867144621-12112007></SPAN></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=867144621-12112007>The only way that you can make use of the remaining very small disk space is to use the smaller block size when formatting. However, unless you know exactly what you're doing, it's not advisable for you to do so since this will more likely impact the performance of your logical drive/partition. A lot of testing were done to determine the optimal block size based on the size of the logical drive/partition that you've created.</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=867144621-12112007></SPAN></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=867144621-12112007>Except for academic reason(s), you should not be concerned with such a small left over.</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=867144621-12112007></SPAN></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=867144621-12112007>Regards,</SPAN></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=867144621-12112007></SPAN></FONT> </DIV><BR> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> <FONT face=Tahoma size=2><B>From:</B> linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] <B>On Behalf Of </B>Joseph L. Casale<BR><B>Sent:</B> Monday, November 12, 2007 4:34 PM<BR><B>To:</B> 'linux-lvm@redhat.com'<BR><B>Subject:</B> [linux-lvm] Beginner Questions<BR></FONT><BR></DIV> <DIV></DIV> <DIV class=Section1> <P class=MsoNormal>Hi,<BR>I have Fedora Core 7 with LVM version: 2.02.24 (2007-03-19), Library version: 1.02.17 (2007-01-29) and Driver version: 4.11.0 setup.<BR><BR>I have two hardware raid cards each with one array partitioned fully at 799.9GB and 1499.9GB. When I try run to pvcreate /dev/sdb1 /dev/sdc1 it creates the pvs and when I run pvdisplay I get this:<o:p></o:p></P> <P class=MsoNormal><o:p> </o:p></P> <P class=MsoNormal> --- Physical volume ---<o:p></o:p></P> <P class=MsoNormal> PV Name /dev/sdb1<o:p></o:p></P> <P class=MsoNormal> VG Name name<o:p></o:p></P> <P class=MsoNormal> PV Size 745.00 GB / not usable 3.67 MB<o:p></o:p></P> <P class=MsoNormal> Allocatable yes<o:p></o:p></P> <P class=MsoNormal> PE Size (KByte) 4096<o:p></o:p></P> <P class=MsoNormal> Total PE 190718<o:p></o:p></P> <P class=MsoNormal> Free PE 190718<o:p></o:p></P> <P class=MsoNormal> Allocated PE 0<o:p></o:p></P> <P class=MsoNormal> PV UUID yQyVCe-tiS4-Ma1E-hilJ-niuG-KXL9-jkKVIk<o:p></o:p></P> <P class=MsoNormal><o:p> </o:p></P> <P class=MsoNormal> --- Physical volume ---<o:p></o:p></P> <P class=MsoNormal> PV Name /dev/sdc1<o:p></o:p></P> <P class=MsoNormal> VG Name name<o:p></o:p></P> <P class=MsoNormal> PV Size 1024.00 GB / not usable 8192.00 EB<o:p></o:p></P> <P class=MsoNormal> Allocatable yes<o:p></o:p></P> <P class=MsoNormal> PE Size (KByte) 4096<o:p></o:p></P> <P class=MsoNormal> Total PE 357626<o:p></o:p></P> <P class=MsoNormal> Free PE 357626<o:p></o:p></P> <P class=MsoNormal> Allocated PE 0<o:p></o:p></P> <P class=MsoNormal> PV UUID PURHhY-Lo1T-5bif-HjGP-dP3o-NVTs-71ZKUm<o:p></o:p></P> <P class=MsoNormal><o:p> </o:p></P> <P class=MsoNormal>Why is some space “not usable”?<o:p></o:p></P> <P class=MsoNormal><o:p> </o:p></P> <P class=MsoNormal>Thanks!<BR>jlc<o:p></o:p></P></DIV></BODY></HTML>