| disk.4 (66bee50af774673bfaeb4c66a5a82e0ac99e70a4) | disk.4 (a51584a2d2fb3731a68eaf93b59e14227e572427) |
|---|---|
| 1.\" Copyright (c) 2020 M. Warner Losh <imp@FreeBSD.org> 2.\" 3.\" Redistribution and use in source and binary forms, with or without 4.\" modification, are permitted provided that the following conditions 5.\" are met: 6.\" 1. Redistributions of source code must retain the above copyright 7.\" notice, this list of conditions and the following disclaimer. 8.\" --- 43 unchanged lines hidden (view full) --- 52Get the sector or block size of the device in bytes. 53The sector size is the smallest unit of data which can be transferred 54from this device. 55This is usually a power of 2 but it might not be (e.g. CDROM audio). 56Operations to block devices such as 57.Xr lseek 2 , 58.Xr read 2 , 59and | 1.\" Copyright (c) 2020 M. Warner Losh <imp@FreeBSD.org> 2.\" 3.\" Redistribution and use in source and binary forms, with or without 4.\" modification, are permitted provided that the following conditions 5.\" are met: 6.\" 1. Redistributions of source code must retain the above copyright 7.\" notice, this list of conditions and the following disclaimer. 8.\" --- 43 unchanged lines hidden (view full) --- 52Get the sector or block size of the device in bytes. 53The sector size is the smallest unit of data which can be transferred 54from this device. 55This is usually a power of 2 but it might not be (e.g. CDROM audio). 56Operations to block devices such as 57.Xr lseek 2 , 58.Xr read 2 , 59and |
| 60.Xr write | 60.Xr write 2 |
| 61may only be performed at file offsets that are integral multiple of 62this size. 63.It Dv DIOCGMEDIASIZE 64.Pq Li "off_t" 65Get the size of the entire device in bytes. 66This should be a multiple of the sector size. 67.It Dv DIOCGFWSECTORS 68.Pq Li "u_int" --- 138 unchanged lines hidden --- | 61may only be performed at file offsets that are integral multiple of 62this size. 63.It Dv DIOCGMEDIASIZE 64.Pq Li "off_t" 65Get the size of the entire device in bytes. 66This should be a multiple of the sector size. 67.It Dv DIOCGFWSECTORS 68.Pq Li "u_int" --- 138 unchanged lines hidden --- |