Difference between revisions of "Hard Drive Sorting"

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Hard drive sorting is done in [[System Evaluation]]. There should already be a tub for keepers and a bucket for recyclers.
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{{migrated}}
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[https://docs.google.com/document/d/1E1HKNPjF-dtto-Nm2VroGKd5-mO-5FtmNP9N5tC1YRY/edit?usp=sharing link]
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Hard drive sorting is done in [[System Evaluation]].
  
 
== Sort ==
 
== Sort ==
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First, check the tub for ones that should be recycled:
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<graphviz>
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digraph D {
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    node [fontname="Helvetica", fontsize="11"]
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    edge [fontname="Helvetica"]
 +
 
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start        [label="START HERE",  shape="box", style="bold"]
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ask          [label="ASK",  shape="box", style="bold"]
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ask2        [label="ASK",  shape="box", style="bold"]
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keep        [label="KEEP",  shape="box", style="bold"]
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recycle      [label="RECYCLE",  shape="box", style="bold"]
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recycle2    [label="RECYCLE",  shape="box", style="bold"]
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fiftypinscsi [label="Is it 50 pin SCSI?"]
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scsi        [label="Is it SCSI?"]
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reg_size    [label="Is it 3.5in?\n(regular sized)"]
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big_size    [label="Is it 5.25in?\n(bigfoot sized)"]
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lap_size    [label="Is it 2.5in?\n(laptop sized)"]
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sata        [label="Is it SATA?"]
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ide        [label="Is it IDE?"]
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scsi_cutoff  [label="Is it 140 GB or greater?"]
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ide_cutoff  [label="Is it 40 GB or greater?"]
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lap_cutoff  [label="Is it 6 GB or greater?"]
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start -> sata
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sata -> keep [label="YES"]
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sata -> ide [ label="NO" ]
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fiftypinscsi -> scsi_cutoff [ label="NO" ]
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fiftypinscsi -> recycle [label="YES"]
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ide -> big_size [ label="YES" ]
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ide -> scsi [label="NO"]
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big_size -> reg_size [label="NO"]
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big_size -> recycle [label="YES"]
  
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Create a temporary place for a recycle pile and put these in it:
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scsi -> fiftypinscsi [ label="YES" ]
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* Regular sized marked under 4 GB
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scsi -> ask2 [ label="NO" ]
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* Bigfoot drives marked under 8 GB
 
  
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If the drive is not marked with a capacity, check the drive geometry (cylinders, head, sectors) information. If cylinders and head are 63 and 13, then half the number of sectors is the approximate size.
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lap_size -> lap_cutoff [label="YES"]
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lap_size -> ask [label="NO"]
  
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Next, check the bucker for ones that should be recycled:
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reg_size -> lap_size  [label="NO"]
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reg_size -> ide_cutoff  [label="YES"]
  
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Put these into the keeper tub:
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scsi_cutoff -> recycle [label="NO"]
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* Regular sized marked 4 GB or bigger
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scsi_cutoff -> keep [label="YES"]
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* Bigfoot drives marked 8 GB or bigger
 
  
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Use the drive geometry trick if necessary to determine the size.
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ide_cutoff -> recycle [label="NO"]
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ide_cutoff -> keep [label="YES"]
  
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Put all the recyclers in the bucket and all the keepers in the tub.
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lap_cutoff -> recycle2 [label="NO"]
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lap_cutoff -> keep [label="YES"]
  
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== Jumpering the Hard Drives ==
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}
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Keepers should be jumpered to "single" or "stand alone" if such a setting is available. Otherwise, they should be jumpered to "master".
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</graphviz>
  
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== Where to put them ==
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; List of drives to recycle:
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* Hard drives in the Recycle bucket go straight to Recycling after they are signed off by the Eval instructor. There is no need to receive or label them.
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* 3 1/2 inch IDE hard drives marked less than '''40 GB'''
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* Good Hard Drives go into the TARDIS (Build Office).
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* 2 1/2 inch IDE hard drives marked less than '''6 GB'''
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* 5 1/4 inch IDE hard drives, regardless of capacity ''(these are known as "Bigfoot" drives)''
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* SCSI drives marked less than '''72 GB'''
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* 50 pin SCSI drives
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* MFM hard drives ''(very old, see example)''
  
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== How to tell a hard drive's capacity ==
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; List of drives to keep:
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Many hard drives are marked with their capacity. The words might be very small, but they're usually there. Look carefully for them. If that doesn't work:
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* 3 1/2 inch IDE hard drives marked '''40 GB or bigger'''
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* SCSI drives marked '''140 GB or bigger'''
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* 2 1/2 inch IDE hard drives marked '''6 GB or bigger'''
  
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; Look at the disk geometry (IDE drives only)
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; When in doubt keep the drive.
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: ID disks might have their disk geometry marked. Disk geometry is identified as
 
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:* Cylinders
 
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:* Heads
 
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:* Sectors
 
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: If the heads and sectors are 16 and 63, you can cut the number of cylinders in half to get the approximate size. For example if the drive is labeled like this:
 
  
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  C    H  S
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; Steps when Sorting
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  16383  16  63
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# First, check the '''recycle''' crate for drives that should be '''kept''':
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# Then check the '''incoming''' crate for drives that should be '''kept or recycled''':
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# Put any keepers in the TARDIS in the incoming drive area (near the door).
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# Destroy any recyclers using the '''hard drive crank'''.
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#* Ask someone in charge to check them before destroying the "recyclers" (even if you think you know how), and ask about the ones you think you want to keep.
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# Stack recyclers in the crates. When crates are 75% full, put them on the cart to go to the warehouse.
  
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:...then you can divide 16,383 by 2 to get 8,191 or so. The drive is just over 8 GB.
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== How to tell a hard drive's capacity ==
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Many hard drives are marked with their capacity. The words might be very small, but they're usually there. Look carefully for them. If that doesn't work:
  
 
; Look for double labeled drives
 
; Look for double labeled drives
Line 58: Line 104:
  
 
; Look for model number schemes
 
; Look for model number schemes
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: Some models model numbers that contain a hint as to the capacity of the drive. For instance, the western digital drives can usually be deduced by dropping the first digit in the model number. In the example above MPC3032AT is approximately a 3.2 GB drive and MPC3043AT is approximately a 4.3. Thus we can determine that the third and fourth digit in the four digit number is the drive size. By comparing similar models, you might be able to determine the probable sizes.
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: Some model numbers contain a hint as to the capacity of the drive. For instance, the western digital drives can usually be deduced by dropping the first digit in the model number. In the example above MPC3032AT is approximately a 3.2 GB drive and MPC3043AT is approximately a 4.3. Thus we can determine that the third and fourth digit in the four digit number is the drive size. By comparing similar models, you might be able to determine the probable sizes.
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; Google is your friend.
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: Try [http://google.com/ googling] the model number and see if anything turns up.
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== Where to put them ==
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* Hard drives in the Recycle bucket go straight to Recycling after they are signed off by the Eval instructor and suitably '''whacked, drilled or squished'''.
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* Good Hard Drives go into the TARDIS
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; Google is your friend
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[[Category: System Evaluation]]
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: Try [[http://google.com/ |googling] the model number and see if anything turns up.
 

Latest revision as of 15:48, 5 July 2014

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Hard drive sorting is done in System Evaluation.

Sort

This is a graph with borders and nodes. Maybe there is an Imagemap used so the nodes may be linking to some Pages.

List of drives to recycle
  • 3 1/2 inch IDE hard drives marked less than 40 GB
  • 2 1/2 inch IDE hard drives marked less than 6 GB
  • 5 1/4 inch IDE hard drives, regardless of capacity (these are known as "Bigfoot" drives)
  • SCSI drives marked less than 72 GB
  • 50 pin SCSI drives
  • MFM hard drives (very old, see example)
List of drives to keep
  • 3 1/2 inch IDE hard drives marked 40 GB or bigger
  • SCSI drives marked 140 GB or bigger
  • 2 1/2 inch IDE hard drives marked 6 GB or bigger
When in doubt keep the drive.
Steps when Sorting
  1. First, check the recycle crate for drives that should be kept:
  2. Then check the incoming crate for drives that should be kept or recycled:
  3. Put any keepers in the TARDIS in the incoming drive area (near the door).
  4. Destroy any recyclers using the hard drive crank.
    • Ask someone in charge to check them before destroying the "recyclers" (even if you think you know how), and ask about the ones you think you want to keep.
  5. Stack recyclers in the crates. When crates are 75% full, put them on the cart to go to the warehouse.

How to tell a hard drive's capacity

Many hard drives are marked with their capacity. The words might be very small, but they're usually there. Look carefully for them. If that doesn't work:

Look for double labeled drives
Some drives have two labels. One generic label lists several different capacities and/or disk geometry. The other label is model specific and lists the model number. For instance one label might say:
MPC3032AT (3.24GB)
MPC3043AT (4.32GB)
MPC3064AT (6.48GB)
MPC3084AT (8.45GB)
MPC3096AT (9.74GB)
The other label says:
Model MPC3032AT
The drive is a 3.24 GB drive
Look for model number schemes
Some model numbers contain a hint as to the capacity of the drive. For instance, the western digital drives can usually be deduced by dropping the first digit in the model number. In the example above MPC3032AT is approximately a 3.2 GB drive and MPC3043AT is approximately a 4.3. Thus we can determine that the third and fourth digit in the four digit number is the drive size. By comparing similar models, you might be able to determine the probable sizes.
Google is your friend.
Try googling the model number and see if anything turns up.

Where to put them

  • Hard drives in the Recycle bucket go straight to Recycling after they are signed off by the Eval instructor and suitably whacked, drilled or squished.
  • Good Hard Drives go into the TARDIS
Retrieved from "http://wiki.freegeek.org/index.php?title=Hard_Drive_Sorting&oldid=70682"