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									Certify Times - Managing Disks - Certify, Verify, Initialize				            </title>
            <link>https://forums.softraid.com/managing-disks-certify-verify-initialize/certify-times/</link>
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                        <title>Certify Times</title>
                        <link>https://forums.softraid.com/managing-disks-certify-verify-initialize/certify-times/#post-4804</link>
                        <pubDate>Sun, 21 Jun 2020 06:01:57 +0000</pubDate>
                        <description><![CDATA[A quick way to do this is a 3 pass certify is a write, then a read pass. so 6X the drive capacity.
a 1TB drive means 6TB of data is read/written.
The unknown is what can the drive sustain ...]]></description>
                        <content:encoded><![CDATA[A quick way to do this is a 3 pass certify is a write, then a read pass. so 6X the drive capacity.
a 1TB drive means 6TB of data is read/written.
The unknown is what can the drive sustain on reads and writes.
at 150MB/s, a 1TB drive can be certified in 1/2 a day.

The problem is disks change behavior dramatically during the certify process. Many modern drives use cheaper "SMR" recording, which causes write performance to drop by 1/2 to 2/3 during the write process. SoftRAID just measures the current speed vs amount remaining to estimate a time, which is why it varies a lot during a certify.

What you see are the hours remaining, guessing at 74. But it will take longer, depending on the disks. I do not know if those Toshiba's have SMR or not.

Here is a table of SMR drives I found on the web:
(formatting does not carry over, but you should be able to figure it out)

List of SMR drives known to the community:		Updated April 19, 2020	
			
Manufacturer - Width	Model No	Model Name	Type
WD - 3.5"	WD20EFAX	2TB WD Red	DM-SMR
WD - 3.5"	WD30EFAX	3TB WD Red	DM-SMR
WD - 3.5"	WD40EFAX	4TB WD Red	DM-SMR
WD - 3.5"	WD60EFAX	6TB WD Red	DM-SMR
WD - 3.5"	WD20EZAZ	2TB Blue	DM-SMR
WD - 3.5"	WD30EZAZ	3TB Blue	DM-SMR
WD - 3.5"	WD40EZAZ	4TB Blue	DM-SMR
WD - 3.5"	WD60EZAZ	6TB Blue	DM-SMR
WD - 3.5"	WD40EMAZ	4TB Elements	DM-SMR
WD - 3.5"	WD60EMAZ	6TB Elements	DM-SMR
WD - 3.5"	WD60EDAZ	6TB My Book	DM-SMR
Seagate - 3.5"	ST2000DM005	2TB Barracuda	DM-SMR
Seagate - 3.5"	ST2000DM008	2TB Barracuda	DM-SMR
Seagate - 3.5"	ST3000DM007	3TB Barracuda	DM-SMR
Seagate - 3.5"	ST4000DM004	4TB Barracuda	DM-SMR
Seagate - 3.5"	ST5000DM003	5TB Barracuda	DM-SMR
Seagate - 3.5"	ST6000DM003	6TB Barracuda	DM-SMR
Seagate - 3.5"	ST8000DM004	8TB Barracuda	DM-SMR
Seagate - 3.5"	ST5000DM000	5TB Desktop	DM-SMR
Seagate - 3.5"	ST5000AS0011	5TB Archive	DM-SMR
Seagate - 3.5"	ST6000AS0002	6TB Archive v2	DM-SMR
Seagate - 3.5"	ST8000AS0002	8TB Archive v2	HA-SMR
Seagate - 3.5"	ST8000AS0003	8TB Exos (Archive v3)	DM-SMR
Toshiba - 3.5"	HDWD240UZSVA	4TB P300 Desktop	DM-SMR
Toshiba - 3.5"	HDWD260UZSVA	6TB P300 Desktop	DM-SMR
Toshiba - 3.5"	DT02ABA400	4TB DT02(-V)	DM-SMR
Toshiba - 3.5"	DT02ABA600	6TB DT02(-V)	DM-SMR
HGST - 3.5"	DC HC600 Series	14TB, 15TB and 20TB Ultrastar	HM-SMR
Toshiba - 2.5"	HDWL110	1TB L200 Slim	DM-SMR
Toshiba - 2.5"	HDWL120	2TB L200	DM-SMR
Toshiba - 2.5"	MQ04ABF100	1TB MQ04	DM-SMR
Toshiba - 2.5"	MQ04ABD200	2TB MQ04	DM-SMR
WD - 2.5"	WD9000LPZX	900GB Blue	DM-SMR
WD - 2.5"	WD10SPZX	1TB Blue	DM-SMR
WD - 2.5"	WD10SPWX	1TB Blue	DM-SMR
WD - 2.5"	WD10SPSX	1TB Black	DM-SMR
WD - 2.5"	WD20SPZX	2TB Blue	DM-SMR
WD - 2.5"	Various	Not For Resale	DM-SMR
Seagate - 2.5"	ST1000LM048	1TB Barracuda	DM-SMR
Seagate - 2.5"	ST2000LM015	2TB Barracuda	DM-SMR
Seagate - 2.5"	ST3000LM024	3TB Barracuda	DM-SMR
Seagate - 2.5"	ST4000LM024	4TB Barracuda	DM-SMR
Seagate - 2.5"	ST5000LM000	5TB Barracuda	DM-SMR]]></content:encoded>
						                            <category domain="https://forums.softraid.com/managing-disks-certify-verify-initialize/">Managing Disks - Certify, Verify, Initialize</category>                        <dc:creator>SoftRAID Support</dc:creator>
                        <guid isPermaLink="true">https://forums.softraid.com/managing-disks-certify-verify-initialize/certify-times/#post-4804</guid>
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				                    <item>
                        <title>Certify Times</title>
                        <link>https://forums.softraid.com/managing-disks-certify-verify-initialize/certify-times/#post-911</link>
                        <pubDate>Sat, 20 Jun 2020 19:59:54 +0000</pubDate>
                        <description><![CDATA[Can you post estimated or average Certify times (as well as Verify and Initialize) for different types of hard drive? 

(Maybe add to the manual or top of the forum) 

I have an OWC Thun...]]></description>
                        <content:encoded><![CDATA[Can you post estimated or average Certify times (as well as Verify and Initialize) for different types of hard drive? 

(Maybe add to the manual or top of the forum) 

I have an OWC ThunderBay 4 RAID 5 Edition with 4x 8TB Toshiba MG05A drives.
If I stop the certifying process, does it damage the drives? If I need to use them?

And, can I formate a raid, use for a short time, and start the certify process again?

Thank you, 

Ronen]]></content:encoded>
						                            <category domain="https://forums.softraid.com/managing-disks-certify-verify-initialize/">Managing Disks - Certify, Verify, Initialize</category>                        <dc:creator>RonenLA</dc:creator>
                        <guid isPermaLink="true">https://forums.softraid.com/managing-disks-certify-verify-initialize/certify-times/#post-911</guid>
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