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94 lines
2.7 KiB
Groff
94 lines
2.7 KiB
Groff
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.TH vblade 8
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.SH NAME
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vblade, vbladed \- export data via ATA over Ethernet
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.SH SYNOPSIS
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.nf
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.B vblade [ -m mac[,mac...] ] shelf slot netif filename
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.fi
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.SH DESCRIPTION
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The
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.I vblade
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command starts a process that uses raw sockets to perform ATA over
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Ethernet, acting like a virtual EtherDrive (R) blade.
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.PP
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The
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.I vbladed
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script can be used to daemonize the vblade process,
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detaching it from your terminal and sending its output to the system
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logs.
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.SS Arguments
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.TP
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\fBshelf\fP
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This should be the shelf address (major AoE address) of the AoE device
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to create.
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.TP
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\fBslot\fP
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This should be the slot address (minor AoE address) of the AoE device
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to create.
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.TP
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\fBnetif\fP
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The name of the ethernet network interface to use for AoE
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communications.
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.TP
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\fBfilename\fP
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The name of the regular file or block device to export.
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.SS Options
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.TP
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\fB-b\fP
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The \-b flag takes an argument, the advertised buffer count, specifying
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the maximum number of outstanding messages the server can queue for
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processing.
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.TP
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\fB-d\fP
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The \-d flag selects O_DIRECT mode for accessing the underlying block
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device.
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.TP
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\fB-s\fP
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The \-s flag selects O_SYNC mode for accessing the underlying block
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device, so all writes are committed to disk before returning to the
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client.
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.TP
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\fB-r\fP
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The \-r flag restricts the export of the device to be read-only.
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.TP
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\fB-m\fP
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The \-m flag takes an argument, a comma separated list of MAC addresses
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permitted access to the vblade. A MAC address can be specified in upper
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or lower case, with or without colons.
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.TP
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\fB-o\fP
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The \-o flag takes an argument, the number of sectors at the beginning
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of the exported file that are excluded from AoE export (default zero).
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.TP
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\fB-l\fP
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The \-l flag takes an argument, the number of sectors to export.
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Defaults to the file size in sectors minus the offset.
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.SH EXAMPLE
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In this example, the root user on a host named
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.I nai
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exports a file named "3TB" to the LAN on eth0 using AoE shelf address 11
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and slot address 1. The process runs in the foreground. Using
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.I vbladed
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would have resulted in the process running as a daemon in the
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background.
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.IP
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.EX
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.nf
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nai:~# vblade 11 1 eth0 /data/3TB
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.fi
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.EE
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.SH NOTES AND WARNINGS
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Users of Jumbo frames should read the README file distributed with
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.I vblade
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to learn about a workaround for kernel buffering limitations.
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.PP
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At least one AoE initiator (WinAoE) has been found to enforce legacy
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CHS geometry for drives by discarding sectors. You should ensure that
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the underlaying regular file or block device size is a multiple of
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8225280 bytes (255 heads, 63 sectors/track, 512 bytes/sector) if you
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encounter filesystem corruption.
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.SH REPORTING BUGS
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Please report bugs to the aoetools-discuss mailing list.
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.SH AUTHOR
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Brantley Coile (brantley@coraid.com)
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