Clarifications about cylinder size and alignment
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@ -9,7 +9,7 @@
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.\" First parameter, NAME, should be all caps
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.\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
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.\" other parameters are allowed: see man(7), man(1)
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.TH XORRISO 1 "Mar 02, 2011"
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.TH XORRISO 1 "Mar 04, 2011"
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.\" Please adjust this date whenever revising the manpage.
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.\"
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.\" Some roff macros, for reference:
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@ -2522,18 +2522,22 @@ The offset value of an ISO image gets preserved when a new session is added.
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So the value defined here is only in effect if a new ISO image gets written.
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.br
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\fBpartition_hd_cyl=\fRnumber gives the number of heads per cylinder for
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partition offset. 0 chooses a default value.
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partition offset. 0 chooses a default value. Maximum is 255.
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.br
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\fBpartition_sec_hd=\fRnumber gives the number of sectors per head for
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partition offset. 0 chooses a default value.
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partition offset. 0 chooses a default value. Maximum is 63.
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.br
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If the product of partition_sec_hd and partition_hd_cyl is too small to
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describe the image size by at most 1024 cylinders, then appropriate values
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of partition_hd_cyl are chosen with partition_sec_hd 32 or 63.
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The product partition_sec_hd * partition_hd_cyl * 512 is the cylinder size.
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It should be divisible by 2048 in order to allow exact alignment.
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If it is too small to describe the image size by at most 1024 cylinders,
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then appropriate values of partition_hd_cyl are chosen with
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partition_sec_hd 32 or 63. If the image is larger than 8,422,686,720 bytes,
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then the cylinder size constraints cannot be fulfilled.
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.br
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\fBpartition_cyl_align=\fRmode controls image size alignment to an integer
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number of cylinders. It is prescribed by isohybrid specs and it seems to
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please program fdisk.
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please program fdisk. Cylinder size must be divisible by 2048.
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Images larger than 8,323,596,288 bytes cannot be aligned.
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.br
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Mode "auto" is default. Alignment by padding happens only with
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"isolinux" "partition_table=on".
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@ -2245,16 +2245,21 @@ filesystem and announced by an MBR partition table entry.
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is added. So the value defined here is only in effect if a new
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ISO image gets written.
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*partition_hd_cyl=*number gives the number of heads per cylinder
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for partition offset. 0 chooses a default value.
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for partition offset. 0 chooses a default value. Maximum is 255.
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*partition_sec_hd=*number gives the number of sectors per head for
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partition offset. 0 chooses a default value.
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If the product of partition_sec_hd and partition_hd_cyl is too
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small to describe the image size by at most 1024 cylinders, then
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appropriate values of partition_hd_cyl are chosen with
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partition_sec_hd 32 or 63.
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partition offset. 0 chooses a default value. Maximum is 63.
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The product partition_sec_hd * partition_hd_cyl * 512 is the
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cylinder size. It should be divisible by 2048 in order to allow
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exact alignment. If it is too small to describe the image size by
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at most 1024 cylinders, then appropriate values of
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partition_hd_cyl are chosen with partition_sec_hd 32 or 63. If the
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image is larger than 8,422,686,720 bytes, then the cylinder size
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constraints cannot be fulfilled.
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*partition_cyl_align=*mode controls image size alignment to an
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integer number of cylinders. It is prescribed by isohybrid specs
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and it seems to please program fdisk.
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and it seems to please program fdisk. Cylinder size must be
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divisible by 2048. Images larger than 8,323,596,288 bytes cannot
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be aligned.
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Mode "auto" is default. Alignment by padding happens only with
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"isolinux" "partition_table=on".
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Mode "on" causes alignment by padding with "partition_table=on"
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@ -4060,7 +4065,7 @@ File: xorriso.info, Node: CommandIdx, Next: ConceptIdx, Prev: Legal, Up: Top
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* -alter_date sets timestamps in ISO image: Manip. (line 146)
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* -alter_date_r sets timestamps in ISO image: Manip. (line 166)
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* -append_partition adds arbitrary file after image end: Bootable.
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(line 197)
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(line 202)
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* -application_id sets application id: SetWrite. (line 117)
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* -as emulates mkisofs or cdrecord: Emulation. (line 13)
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* -assert_volid rejects undesired images: Loading. (line 84)
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@ -4263,7 +4268,7 @@ File: xorriso.info, Node: ConceptIdx, Prev: CommandIdx, Up: Top
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* ACL, show in ISO image, -getfacl: Navigate. (line 69)
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* ACL, show in ISO image, -getfacl_r: Navigate. (line 76)
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* Appendable media, _definition: Media. (line 38)
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* Appended Filesystem Image, -append_partition: Bootable. (line 197)
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* Appended Filesystem Image, -append_partition: Bootable. (line 202)
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* Backslash Interpretation, _definition: Processing. (line 49)
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* Backup, enable fast incremental, -disk_dev_ino: Loading. (line 182)
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* Backup, enable features, -for_backup: Loading. (line 177)
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@ -4281,7 +4286,7 @@ File: xorriso.info, Node: ConceptIdx, Prev: CommandIdx, Up: Top
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* Closed media, _definition: Media. (line 43)
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* Comment, #: Scripting. (line 128)
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* Create, new ISO image, _definiton: Methods. (line 6)
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* Cylinder alignment, _definiton: Bootable. (line 166)
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* Cylinder alignment, _definiton: Bootable. (line 169)
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* Cylinder size, _definiton: Bootable. (line 158)
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* Delete, from ISO image, -rm: Manip. (line 21)
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* Delete, from ISO image, -rm_r: Manip. (line 28)
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@ -4376,7 +4381,7 @@ File: xorriso.info, Node: ConceptIdx, Prev: CommandIdx, Up: Top
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* Media, erase, -blank: Writing. (line 45)
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* Media, format, -format: Writing. (line 69)
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* Media, list formats, -list_formats: Writing. (line 107)
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* MIPS boot file, activation: Bootable. (line 173)
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* MIPS boot file, activation: Bootable. (line 178)
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* mkisofs, Emulation: Emulation. (line 16)
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* Modifying, _definition: Methods. (line 27)
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* Multi-session media, _definition: Media. (line 7)
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@ -4455,8 +4460,8 @@ File: xorriso.info, Node: ConceptIdx, Prev: CommandIdx, Up: Top
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* Session, mount command line, -mount_cmd: Inquiry. (line 31)
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* Session, mount parameters, -mount_opts: Inquiry. (line 47)
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* Session, select as input, -load: Loading. (line 11)
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* SUN Disk Label, production: Bootable. (line 184)
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* SUN SPARC boot images, activation: Bootable. (line 218)
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* SUN Disk Label, production: Bootable. (line 189)
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* SUN SPARC boot images, activation: Bootable. (line 223)
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* System area, _definiton: Bootable. (line 123)
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* Table-of-content, search sessions, -rom_toc_scan: Loading. (line 203)
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* Table-of-content, show, -toc: Inquiry. (line 18)
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@ -4518,38 +4523,38 @@ Node: Filter79052
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Node: Writing83401
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Node: SetWrite89690
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Node: Bootable103631
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Node: Jigdo116588
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Node: Charset120846
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Node: Exception123597
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Node: DialogCtl128112
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Node: Inquiry130699
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Node: Navigate135076
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Node: Verify143016
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Node: Restore151605
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Node: Emulation158261
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Node: Scripting167632
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Node: Frontend173194
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Node: Examples174489
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Node: ExDevices175658
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Node: ExCreate176292
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Node: ExDialog177566
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Node: ExGrowing178828
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Node: ExModifying179630
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Node: ExBootable180131
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Node: ExCharset180678
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Node: ExPseudo181506
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Node: ExCdrecord182400
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Node: ExMkisofs182715
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Node: ExGrowisofs183718
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Node: ExException184842
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Node: ExTime185296
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Node: ExIncBackup185755
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Node: ExRestore189676
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Node: ExRecovery190645
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Node: Files191211
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Node: Seealso192439
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Node: Legal192963
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Node: CommandIdx193885
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Node: ConceptIdx208192
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Node: Jigdo116943
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Node: Charset121201
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Node: Exception123952
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Node: DialogCtl128467
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Node: Inquiry131054
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Node: Navigate135431
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Node: Verify143371
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Node: Restore151960
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Node: Emulation158616
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Node: Scripting167987
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Node: Frontend173549
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Node: Examples174844
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Node: ExDevices176013
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Node: ExCreate176647
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Node: ExDialog177921
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Node: ExGrowing179183
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Node: ExModifying179985
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Node: ExBootable180486
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Node: ExCharset181033
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Node: ExPseudo181861
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Node: ExCdrecord182755
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Node: ExMkisofs183070
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Node: ExGrowisofs184073
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Node: ExException185197
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Node: ExTime185651
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Node: ExIncBackup186110
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Node: ExRestore190031
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Node: ExRecovery191000
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Node: Files191566
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Node: Seealso192794
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Node: Legal193318
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Node: CommandIdx194240
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Node: ConceptIdx208547
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End Tag Table
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@ -44,7 +44,7 @@
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@c man .\" First parameter, NAME, should be all caps
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@c man .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
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@c man .\" other parameters are allowed: see man(7), man(1)
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@c man .TH XORRISO 1 "Mar 03, 2011"
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@c man .TH XORRISO 1 "Mar 04, 2011"
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@c man .\" Please adjust this date whenever revising the manpage.
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@c man .\"
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@c man .\" Some roff macros, for reference:
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@ -2994,19 +2994,23 @@ So the value defined here is only in effect if a new ISO image gets written.
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@*
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@cindex Cylinder size, _definiton
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@strong{partition_hd_cyl=}number gives the number of heads per cylinder for
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partition offset. 0 chooses a default value.
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partition offset. 0 chooses a default value. Maximum is 255.
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@*
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@strong{partition_sec_hd=}number gives the number of sectors per head for
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partition offset. 0 chooses a default value.
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partition offset. 0 chooses a default value. Maximum is 63.
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@*
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If the product of partition_sec_hd and partition_hd_cyl is too small to
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describe the image size by at most 1024 cylinders, then appropriate values
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of partition_hd_cyl are chosen with partition_sec_hd 32 or 63.
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The product partition_sec_hd * partition_hd_cyl * 512 is the cylinder size.
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It should be divisible by 2048 in order to allow exact alignment.
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If it is too small to describe the image size by at most 1024 cylinders,
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then appropriate values of partition_hd_cyl are chosen with
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partition_sec_hd 32 or 63. If the image is larger than 8,422,686,720 bytes,
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then the cylinder size constraints cannot be fulfilled.
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@*
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@cindex Cylinder alignment, _definiton
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@strong{partition_cyl_align=}mode controls image size alignment to an integer
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number of cylinders. It is prescribed by isohybrid specs and it seems to
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please program fdisk.
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please program fdisk. Cylinder size must be divisible by 2048.
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Images larger than 8,323,596,288 bytes cannot be aligned.
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@*
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Mode "auto" is default. Alignment by padding happens only with
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"isolinux" "partition_table=on".
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