boot.attach
===========

Attach a disk to the boot pool, turning a stripe into a mirror.

This method is a job.

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    <span class="badge badge-dark value-type">Type: object</span><br/>
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    <span class="badge badge-dark value-type">Type: array</span><br/>
    <span class="badge badge-info no-additional">No Additional Items</span><h4>Tuple Validation</h4>
    <h5>Parameter 1: dev</h5>
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    <h4>dev</h4><span class="badge badge-dark value-type">Type: string</span><br/>
    <span class="description"><p>Device name or path to attach to the boot pool.</p>
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    <h5>Parameter 2: options</h5>
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    <h4>options</h4><span class="badge badge-dark value-type">Type: object</span><br/>
    <span class="description"><p>Options for the attach operation.</p>
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    <h4>Expand</h4><span class="badge badge-dark value-type">Type: boolean</span> <span class="badge badge-success default-value">Default: false</span><br/>
    <span class="description"><p>When <code>true</code>, size the new disk's partition to the maximum available space. When <code>false</code>, size it to match the existing boot pool partition to avoid a size mismatch if a disk later fails.</p>
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    <h4>Result</h4><span class="badge badge-dark value-type">Type: null</span><br/>
    <span class="description"><p>Returns <code>null</code> when the disk is successfully attached to the boot pool.</p>
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*Required roles:* DISK_WRITE