Lines Matching +full:- +full:- +full:disk

1 .\" Copyright 2011-2024 Roderick W. Smith (rodsmith@rodsbooks.com)
5 cgdisk \- Curses-based GUID partition table (GPT) manipulator
8 [ \-a ]
13 GPT fdisk is a text\-mode family of programs for creation and manipulation
15 curses-based user interface for interaction using a text\-mode menuing
16 system. It will automatically convert an old\-style Master Boot Record
20 program family are \fBgdisk\fR (the most feature-rich program of the group,
21 with a non-curses-based interactive user interface) and \fBsgdisk\fR (which
22 is driven via command-line options for use by experts or in scripts).
34 modify disk structures until you explicitly write them to disk, so if you
38 Ordinarily, \fBcgdisk\fR operates on disk device files, such as
41 can also operate on disk image files, which can be either copies of whole
42 disks (made with \fBdd\fR, for instance) or raw disk images used by
43 emulators such as QEMU or VMWare. Note that only \fIraw\fR disk images
45 disk image formats.
48 the disk. If it finds valid GPT data, \fBcgdisk\fR will use it. If
55 type codes may become corrupted if the disk uses unrecognized type codes.
56 Boot problems are particularly likely if you're multi\-booting with any
57 GPT\-unaware OS. If you mistakenly launch \fBcgdisk\fR on an MBR disk, you
66 For data (non\-boot) disks, and for boot disks used on BIOS\-based computers
72 Boot disks for EFI\-based systems require an \fIEFI System
73 Partition\fR (GPT fdisk internal code 0xEF00) formatted as FAT\-32.
75 Boot\-related files are stored here. (Note that GNU Parted identifies
80 The GRUB 2 boot loader for BIOS\-based systems makes use of a \fIBIOS Boot
88 If Windows is to boot from a GPT disk, a partition of type \fIMicrosoft
99 each partition. The intent is to enable future disk utilities to use this
101 help in future disk maintenance. You can use GPT fdisk's relative partition
109 Only one command-line option is accepted, aside from the device filename:
110 \fI\-a\fR. This option alters the highlighting of partitions and blocks of
111 free space: Instead of using ncurses, when \fI\-a\fR is used \fBcgdisk\fR
116 Interactions with \fBcgdisk\fR occur with its interactive text\-mode menus.
131 number, the device filename associated with the disk, and the disk's size
132 in both sectors and IEEE-1541 units (GiB, TiB, and so on).
185 (2048\-sectors on disks with 512-byte sectors) by default, which optimizes
186 performance for all of these disk types. On pre\-partitioned disks, GPT
187 fdisk attempts to identify the alignment value used on that disk, but will
188 set 8-sector alignment on disks larger than 300 GB even if lesser alignment
193 the alignment value in size. Some disk encryption tools require partitions
200 in\-memory partition table to a disk file using this option. The resulting
203 order. Note that the backup is of the current in\-memory data structures, so
211 the partition on the disk. If a corresponding hybrid MBR partition exists,
223 partitions' unique GUIDs and the partitions' sector-exact start and end
230 original disk is not recommended.
234 Change the GPT name of a partition. This name is encoded as a UTF\-16
250 specifies a position 40MiB from the start of the disk. You can specify
267 two\-byte hexadecimal number. You may also enter a GUID directly, if you
273 case\-insensitively.
277 Verify disk. This option checks for a variety of problems, such as
281 unallocated disk space.
296 x86\-64 (64\-bit), x86 (32\-bit), and PowerPC (32\-bit) have been tested,
297 with the x86\-64 version having seen the most testing. Under FreeBSD,
298 32\-bit (x86) and 64\-bit (x86\-64) versions have been tested. Only 32\-bit
304 table to a disk when existing partitions on that disk are mounted. (The
315 will require using a larger\-than\-normal partition table. (The limit
322 the start or (more commonly) the end of the disk. Resizing the partition
330 MBR conversions work only if the disk has correct LBA partition
331 descriptors. These descriptors should be present on any disk over 8 GiB in
344 conversions from this form may be unreliable \-\- partitions may be dropped,
351 Booting after converting an MBR or BSD disklabel disk is likely to be
352 disrupted. Sometimes re\-installing a boot loader will fix the problem, but
353 other times you may need to switch boot loaders. Except on EFI\-based