nasman

Seagate 2.5inch NAS

Recommended Posts

I've been running 1TB WD RED 2.5 and 2TB Samsung 2.5 inch laptop drivers in separate RAID6 configs quite successfully for 18 months.

I've out grown my storage and am looking at 12x Seagate 5TB 2.5 drives.

Has anyone experience of these in a raid config?

Share this post


Link to post
Share on other sites

They're SMR so rebuild performance is probably horrible, if that's something you're worried about... other than that, I got nothin.' :P

Share this post


Link to post
Share on other sites

Thanks continuum, write speed isn't important luckily and neither is read speed much. So long as I'm reading/writing at 80 MB/s minimum sequential. Random isn't an issue either.

My usage is as a Plex server mostly. Although I store family videos/photos. Having optical media backups in place so data loss would just be a huge time wasting inconvenience.

There aren't many people who have used smr drives in raid so I'm curious if they'll work. All the fears over lack of TLER haven't proven to be an issue but then my driver's are still fairly young at 18-24 months old and very light usage. I keep them running 24/7 though. They've had about 20 cold boots.  The Samsung/Seagate 2TB drives had head parking disabled as they were clocking up rapidly.

Anyone successfully disabled head Parking on these large capacity smr drives? 

Edited by nasman

Share this post


Link to post
Share on other sites
 

Thanks continuum, write speed isn't important luckily and neither is read speed much. So long as I'm reading/writing at 80 MB/s minimum sequential. Random isn't an issue either.

My usage is as a Plex server mostly. Although I store family videos/photos. Having optical media backups in place so data loss would just be a huge time wasting inconvenience.

There aren't many people who have used smr drives in raid so I'm curious if they'll work. All the fears over lack of TLER haven't proven to be an issue but then my driver's are still fairly young at 18-24 months old and very light usage. I keep them running 24/7 though. They've had about 20 cold boots.  The Samsung/Seagate 2TB drives had head parking disabled as they were clocking up rapidly.

Anyone successfully disabled head Parking on these large capacity smr drives? 

Hey nasman, thanks for reaching out to us here both on this post and the PM you sent. Sorry we've taken a moment to get back to you. Had to pull in our experts on this one as it went beyond the scope of the forums team's understanding. Our SeaChest_Configure command-line tool allows for timers on error recovery controls to be adjusted, our nomenclature for this is "SCT Error Recovery Control". The documentation:
 

 --sctReadTimer [info | value] (SATA Only) (Seagate Only)
                Use this option to set the read command timer value for
                synchronous commands and NCQ commands with in-order data
                delivery enabled. Note: this timer starts at the time that the
                drive processes the command, not the time it is received. This
                timer value is volatile and is cleared at each power cycle. Use
                the "info" argument to get the current status of the read
                timer. A value of 0 means that all possible error recovery will
                be performed before returning status (i.e. the Read Command
                Timer is disabled). Other values should include a unit to know
                the time to use. If no unit is provided, it is assumed to be
                the value * 100 ms. The maximum time that can be specified is 1
                hour, 49 minutes, 13 seconds. Note: On some SAT HBAs/bridges,
                status will not be able to be determined due to HBA/bridge
                limitations.

                Ex1: --sctReadTimer 15s for a 15 second timer.
                Ex2: --sctReadTimer 15000ms for a 15 second timer expressed in
                     milliseconds
                Ex2: --sctReadTimer 150 for a 15 second timer with no units
                     specified


        --sctWriteTimer [info | value] (SATA Only) (Seagate Only)
                Use this option to set the write command timer value for
                synchronous commands and NCQ commands with in-order data
                delivery enabled. Note: this timer starts at the time that the
                drive processes the command, not the time it is received. This
                timer value is volatile and is cleared at each power cycle. Use
                the "info" argument to get the current status of the write
                timer. A value of 0 means that all possible error recovery will
                be performed before returning status (i.e. the Write Command
                Timer is disabled). Other values should include a unit to know
                the time to use. If no unit is provided, it is assumed to be
                the value * 100 ms. The maximum time that can be specified is 1
                hour, 49 minutes, 13 seconds. Note: On some SAT HBAs/bridges,
                status will not be able to be determined due to HBA/bridge
                limitations.

                Ex1: --sctWriteTimer 15s for a 15 second timer.
                Ex2: --sctWriteTimer 15000ms for a 15 second timer expressed in
                     milliseconds
                Ex2: --sctWriteTimer 150 for a 15 second timer with no units
                     specified

This feature is also available in our openSeaChest toolset under openSeaChest_Configure with the same command-line options. Also, to verify if this feature is enabled on any drive, the --deviceinfo (or -i) command will list some features supported by the drive. Example, output may show something along these lines:


 Features Supported:
                Sanitize
                SATA NCQ
                SATA Device Sleep Preservation
                SATA Software Settings Preservation [Enabled]
                SATA Device Initiated Power Management
                Power Management
                Security
                SMART [Enabled]
                48bit Address
                APM [Enabled]
                GPL
                DSN
                AMAC
                Sense Data Reporting
                TRIM
                SCT Write Same
      ----->  SCT Error Recovery Control
                SCT Feature Control
                SCT Data Tables
                Host Logging

As far as head parking, SeaTools should be able to adjust this under functions to disable extended power conditions.

Edited by seagate_surfer
added content to address question on head parking

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now