<div>Dear Strahil,</div><div style="font-family: Arial, sans-serif; font-size: 14px; color: rgb(0, 0, 0);"><br>Thank you very much for pointing me to the RedHat documentation. I wasn't aware of it and it is much more detailed. I will have to read it carefully.</div><div style="font-family: Arial, sans-serif; font-size: 14px; color: rgb(0, 0, 0);"><br></div><div style="font-family: Arial, sans-serif; font-size: 14px; color: rgb(0, 0, 0);">Now as I have a single disk (no RAID) based on that documentation I understand that I should use a data alignment value of 256kB.</div><div style="font-family: Arial, sans-serif; font-size: 14px; color: rgb(0, 0, 0);"><br></div><div style="font-family: Arial, sans-serif; font-size: 14px; color: rgb(0, 0, 0);">Best regards,</div><div style="font-family: Arial, sans-serif; font-size: 14px; color: rgb(0, 0, 0);">Mabi<br></div><div style="font-family: Arial, sans-serif; font-size: 14px;"><br></div><div class="protonmail_quote">
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On Wednesday, June 7th, 2023 at 6:56 AM, Strahil Nikolov <hunter86_bg@yahoo.com> wrote:<br><br>
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Have you checked this page: https://access.redhat.com/documentation/en-us/red_hat_gluster_storage/3.5/html/administration_guide/brick_configuration ?<div><br></div><div>The alignment depends on the HW raid stripe unit size.</div><div><br></div><div>Best Regards,</div><div>Strahil Nikolov <br> <br> <blockquote style="margin: 0 0 20px 0;"> <div style="font-family:Roboto, sans-serif; color:#6D00F6;"> <div>On Tue, Jun 6, 2023 at 2:35, mabi</div><div><mabi@protonmail.ch> wrote:</div> </div> <div style="padding: 10px 0 0 20px; margin: 10px 0 0 0; border-left: 1px solid #6D00F6;"> <div dir="ltr">Hello,<br></div><div dir="ltr"><br></div><div dir="ltr">I am preparing a brick as LVM thin volume for a test slave node using this documentation: <br></div><div dir="ltr"><br></div><div dir="ltr"><a target="_blank" href="https://docs.gluster.org/en/main/Administrator-Guide/formatting-and-mounting-bricks/" rel="noreferrer nofollow noopener">https://docs.gluster.org/en/main/Administrator-Guide/formatting-and-mounting-bricks/</a><br></div><div dir="ltr"><br></div><div dir="ltr">but I am confused regarding the right "--dataalignment" option to be used for pvcreate. The documentation mentions the following under point 1:<br></div><div dir="ltr"><br></div><div dir="ltr">"Create a physical volume(PV) by using the pvcreate command. For example:<br></div><div dir="ltr"><br></div><div dir="ltr">pvcreate --dataalignment 128K /dev/sdb<br></div><div dir="ltr"><br></div><div dir="ltr">Here, /dev/sdb is a storage device. Use the correct dataalignment option based on your device.<br></div><div dir="ltr"><br></div><div dir="ltr"> Note: The device name and the alignment value will vary based on the device you are using."<br></div><div dir="ltr"><br></div><div dir="ltr">As test disk for this brick I have an external USB 500GB SSD disk from Samsung PSSD T7 (https://semiconductor.samsung.com/consumer-storage/portable-ssd/t7/) but my question is where do I find the information on which alignment value I need to use for this specific disk?<br></div><div dir="ltr"><br></div><div dir="ltr">Best regards,<br></div><div dir="ltr">Mabi <br></div><div dir="ltr">________<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">Community Meeting Calendar:<br></div><div dir="ltr"><br></div><div dir="ltr">Schedule -<br></div><div dir="ltr">Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC<br></div><div dir="ltr">Bridge: <a target="_blank" href="https://meet.google.com/cpu-eiue-hvk" rel="noreferrer nofollow noopener">https://meet.google.com/cpu-eiue-hvk</a><br></div><div dir="ltr">Gluster-users mailing list<br></div><div dir="ltr"><a href="mailto:Gluster-users@gluster.org" rel="noreferrer nofollow noopener" target="_blank">Gluster-users@gluster.org</a><br></div><div dir="ltr"><a target="_blank" href="https://lists.gluster.org/mailman/listinfo/gluster-users" rel="noreferrer nofollow noopener">https://lists.gluster.org/mailman/listinfo/gluster-users</a><br></div> </div> </blockquote></div>
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