include/sys/vdev_disk.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (C) 2008-2010 Lawrence Livermore National Security, LLC.
  23  * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
  24  * Written by Brian Behlendorf <behlendorf1@llnl.gov>.
  25  * LLNL-CODE-403049.
  26  * Copyright (c) 2018 by Delphix. All rights reserved.
  27  */
  28
  29 #ifndef _SYS_VDEV_DISK_H
  30 #define _SYS_VDEV_DISK_H
  31
  32 /*
  33  * Don't start the slice at the default block of 34; many storage
  34  * devices will use a stripe width of 128k, other vendors prefer a 1m
  35  * alignment.  It is best to play it safe and ensure a 1m alignment
  36  * given 512B blocks.  When the block size is larger by a power of 2
  37  * we will still be 1m aligned.  Some devices are sensitive to the
  38  * partition ending alignment as well.
  39  */
  40 #define NEW_START_BLOCK         2048
  41 #define PARTITION_END_ALIGNMENT 2048
  42
  43 #ifdef _KERNEL
  44 #include <sys/vdev.h>
  45 #endif /* _KERNEL */
  46 #endif /* _SYS_VDEV_DISK_H */