Hi, all -- I have a 1T drive jpo:~ # parted /dev/sdb print Model: ATA ST31000524AS (scsi) Disk /dev/sdb: 1000GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 1049kB 1000GB 1000GB primary ntfs type=07 jpo:~ # smartctl -i /dev/sdb smartctl 7.0 2019-05-21 r4917 [x86_64-linux-5.3.18-lp152.78-default] (SUSE RPM) Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Seagate Barracuda 7200.12 Device Model: ST31000524AS Serial Number: 9VPG4SHD LU WWN Device Id: 5 000c50 04d20d244 Firmware Version: JC45 User Capacity: 1,000,204,886,016 bytes [1.00 TB] Sector Size: 512 bytes logical/physical Rotation Rate: 7200 rpm Device is: In smartctl database [for details use: -P show] ATA Version is: ATA8-ACS T13/1699-D revision 4 SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Thu Jul 8 11:32:27 2021 UTC SMART support is: Available - device has SMART capability. SMART support is: Enabled and also two 500G drives jpo:~ # parted /dev/sdc print Model: ATA WDC WD5000AAVS-0 (scsi) Disk /dev/sdc: 500GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 356GB 356GB ata-WDC_WD5000AAVS-00ZTB0_WD-WMASU06 raid 2 356GB 495GB 139GB raid 4 495GB 500GB 5001MB reiserfs wwn-0x50014ee055b724ad jpo:~ # smartctl -i /dev/sdc smartctl 7.0 2019-05-21 r4917 [x86_64-linux-5.3.18-lp152.78-default] (SUSE RPM) Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Western Digital Caviar Green Device Model: WDC WD5000AAVS-00ZTB0 Serial Number: WD-WMASU0686160 LU WWN Device Id: 5 0014ee 055b724ad Firmware Version: 01.01B01 User Capacity: 500,107,862,016 bytes [500 GB] Sector Size: 512 bytes logical/physical Device is: In smartctl database [for details use: -P show] ATA Version is: ATA8-ACS (minor revision not indicated) SATA Version is: SATA 2.5, 3.0 Gb/s Local Time is: Thu Jul 8 11:32:35 2021 UTC SMART support is: Available - device has SMART capability. SMART support is: Enabled that I plan to stripe together to use to protect the first. The Caviars are listed as variable speed, but in practice they apparently are just 5400 rpm, so I'd like to take advantage of striping to make them as fast as possible. This isn't the black magic ;-) of RAID10-on-two-drives, so I don't have to think of one as "front" and one as "back", but do I want more than one partition on each to stripe 4 or 6 slices to avoid hammering on one, or do I just go with each device as a whole and let mdadm handle the magic for me? I also plan to use a partition on the 1T drive, but once I have the striped metadevice do I particularly want or particlularly not want to slice a partition out of it? I figured I would partition since that would let me exactly match the mirror halves to each other. Oh, and to make this more fun the two 500s are actually part of a 3-dev RAID5 set holding the data to migrate to the 1T to then mirror, so I don't get to destructively play with this a dozen times :-) Thanks in advance & have a great day! :-D -- David T-G See http://justpickone.org/davidtg/email/ See http://justpickone.org/davidtg/tofu.txt
