docs: fix some typos/grammar
Rund `codespell` tool, but it picked up not as much as I hoped. Rest was found with vim + (hun)spell Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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Thomas Lamprecht
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@ -6,7 +6,7 @@ onto magnetic tapes. This increases data safety because you get:
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- an additional copy of the data
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- to a different media type (tape)
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- to an additional location (you can move tapes offsite)
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- to an additional location (you can move tapes off-site)
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In most restore jobs, only data from the last backup job is restored.
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Restore requests further decline the older the data
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@ -17,8 +17,8 @@ years.
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Tape backups do not provide random access to the stored data. Instead,
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you need to restore the data to disk before you can access it
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again. Also, if you store your tapes offsite (using some kind of tape
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vaulting service), you need to bring them onsite before you can do any
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again. Also, if you store your tapes off-site (using some kind of tape
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vaulting service), you need to bring them on-site before you can do any
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restore. So please consider that restores from tapes can take much
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longer than restores from disk.
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@ -30,7 +30,7 @@ Tape Technology Primer
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As of 2021, the only broadly available tape technology standard is
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`Linear Tape Open`_, and different vendors offers LTO Ultrium tape
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drives, autoloaders and LTO tape cartridges.
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drives, auto-loaders and LTO tape cartridges.
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There are a few vendors offering proprietary drives with
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slight advantages in performance and capacity, but they have
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@ -51,14 +51,14 @@ In general, LTO tapes offer the following advantages:
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- Multiple vendors (for both media and drives)
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- Build in AES-CGM Encryption engine
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Please note that `Proxmox Backup Server` already stores compressed
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data, so we do not need/use the tape compression feature.
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Note that `Proxmox Backup Server` already stores compressed data, so using the
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tape compression feature has no advantage.
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Supported Hardware
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------------------
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Proxmox Backup Server supports `Linear Tape Open`_ genertion 4 (LTO4)
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Proxmox Backup Server supports `Linear Tape Open`_ generation 4 (LTO4)
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or later. In general, all SCSI2 tape drives supported by the Linux
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kernel should work, but feature like hardware encryptions needs LTO4
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or later.
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@ -70,7 +70,7 @@ tool. So any changer device supported by that tool should work.
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Drive Performance
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~~~~~~~~~~~~~~~~~
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Current LTO-8 tapes provide read/write speeds up to 360MB/s. This means,
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Current LTO-8 tapes provide read/write speeds up to 360 MB/s. This means,
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that it still takes a minimum of 9 hours to completely write or
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read a single tape (even at maximum speed).
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@ -89,7 +89,7 @@ datastore is able to deliver that performance (e.g, by using SSDs).
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Terminology
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-----------
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:Tape Labels: are used to uniquely indentify a tape. You normally use
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:Tape Labels: are used to uniquely identify a tape. You normally use
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some sticky paper labels and apply them on the front of the
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cartridge. We additionally store the label text magnetically on the
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tape (first file on tape).
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@ -102,7 +102,7 @@ Terminology
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:Barcodes: are a special form of tape labels, which are electronically
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readable. Most LTO tape robots use an 8 character string encoded as
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`Code 39`_, as definded in the `LTO Ultrium Cartridge Label
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`Code 39`_, as defined in the `LTO Ultrium Cartridge Label
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Specification`_.
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You can either buy such barcode labels from your cartridge vendor,
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@ -122,7 +122,7 @@ Terminology
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:Media Set: A group of continuously written tapes (all from the same
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media pool).
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:Tape drive: The decive used to read and write data to the tape. There
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:Tape drive: The device used to read and write data to the tape. There
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are standalone drives, but drives often ship within tape libraries.
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:Tape changer: A device which can change the tapes inside a tape drive
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@ -135,7 +135,7 @@ Terminology
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identify tape cartridges and an automated method for loading tapes
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(a robot).
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People als call this 'autoloader', 'tape robot' or 'tape jukebox'.
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This is also commonly known as 'autoloader', 'tape robot' or 'tape jukebox'.
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:Inventory: The inventory stores the list of known tapes (with
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additional status information).
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@ -231,7 +231,7 @@ To test your setup, please query the status of the changer device with::
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└───────────────┴──────────┴────────────┴─────────────┘
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Tape libraries usually provide some special import/export slots (also
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called "mail slots"). Tapes inside those slots are acessible from
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called "mail slots"). Tapes inside those slots are accessible from
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outside, making it easy to add/remove tapes to/from the library. Those
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tapes are considered to be "offline", so backup jobs will not use
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them. Those special slots are auto-detected and marked as
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@ -303,7 +303,7 @@ changer device::
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The ``--changer-drivenum`` is only necessary if the tape library
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includes more than one drive (The changer status command lists all
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drivenums).
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drive numbers).
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You can show the final configuration with::
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@ -392,7 +392,7 @@ one media pool, so a job only uses tapes from that pool.
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``--export`` option.
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.. NOTE:: Retention period starts with the existence of a newer
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media set.
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media set.
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- Always create a new media set.
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@ -417,7 +417,7 @@ one media pool, so a job only uses tapes from that pool.
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For example, the value ``weekly`` (or ``Mon *-*-* 00:00:00``)
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will create a new set each week.
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This balances between space efficency and media count.
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This balances between space efficiency and media count.
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.. NOTE:: Retention period starts when the calendar event
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triggers.
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@ -540,7 +540,7 @@ drive and run::
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You may omit the ``--pool`` argument to allow the tape to be used by any pool.
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.. Note:: For safety reasons, this command fails if the tape contain
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any data. If you want to overwrite it anways, erase the tape first.
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any data. If you want to overwrite it anyway, erase the tape first.
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You can verify success by reading back the label::
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@ -587,7 +587,7 @@ The following options are available:
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--export-media-set Export media set upon job completion.
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After a sucessful backup job, this moves all tapes from the used
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After a successful backup job, this moves all tapes from the used
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media set into import-export slots. The operator can then pick up
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those tapes and move them to a media vault.
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@ -686,7 +686,7 @@ into the drive. Then run::
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Tepe Encryption Key Password: ***********
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If the password is correct, the key will get imported to the
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database. Further restore jobs automatically use any availbale key.
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database. Further restore jobs automatically use any available key.
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Tape Cleaning
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@ -752,7 +752,7 @@ Options
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``tape.cfg``
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~~~~~~~~~~~~~~~~~~
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~~~~~~~~~~~~
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File Format
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^^^^^^^^^^^
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@ -767,7 +767,7 @@ Options
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``tape-job.cfg``
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~~~~~~~~~~~~~~~~~~
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~~~~~~~~~~~~~~~~
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File Format
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^^^^^^^^^^^
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@ -792,7 +792,7 @@ Command Syntax
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``pmt``
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--------
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-------
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.. include:: pmt/options.rst
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