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--- nas:build_a_linux_nas:prepare_the_raid_disks [2021/09/25 20:51] – peter
+++ nas:build_a_linux_nas:prepare_the_raid_disks [2021/10/12 20:36] (current) – [Test the Disks] peter
@@ Line 36: / Line 36: @@
 ===== Obtain the Serial Numbers of the Disks =====
-Obtain the serial number for every disk; and keep a record of this somewhere safe.
 <code bash>
@@ Line 48: / Line 46: @@
 Model=ST16000NM001G-2KK103, FwRev=SB30, SerialNo=WL2091XL
 </code>
+<WRAP important>
+**IMPORTANT:**  Obtain the serial number for every disk; and keep a record of this somewhere safe.
+</WRAP>
 <WRAP info>
@@ Line 55: / Line 58: @@
   * The enclosure being used for the disks may not support hot-swapping and there may not be a separate light for each disk, so there may not be a straight-forward way to determine which specific disk has failed.
+</WRAP>
+----
+===== Test the Disks =====
+All hard drives, both new and old, should be tested before adding them to an array.
+See S.M.A.R.T. to view smart data and run smart tests.
+Do a short smart test:
+<code bash>
+smartctl -t short /dev/sdb [-d sat]
+</code>
+Do a long smart test:
+<code bash>
+smartctl -t long /dev/sdb [-d sat]
+</code>
+Check all smart attributes:
+<code bash>
+smartctl -a /dev/sdb [-d sat]
+</code>
+Do a random readwrite test:
+<code bash>
+sudo fio --filename="/dev/sdb --name=randwrite --ioengine=sync --iodepth=1 --rw=randrw --rwmixread=50 --rwmixwrite=50 --bs=4k --direct=0 --numjobs=8 --size=300G --runtime=7200 --group_reporting
+</code>
+<WRAP info>
+**NOTE:** The smartmontools package might be needed to be installed:
+<code bash>
+sudo apt install smartmontools
+</code>
+  * **-d sat**:  Sata disks.
+See:  https://www.smartmontools.org/
 </WRAP>
@@ Line 222: / Line 270: @@
 ===== Partition other Disks =====
-Repeat the above instructions for the other free disks.
+<WRAP info>
+**NOTE:** Repeat the above instructions for the other free disks.
+</WRAP>
 ----