Introduction PC Workstation 2015 RAID Service Guide This document lists the SATA Disk Drives approved for use in the PCWS 2015 including RAID, suggestions for determining which drive in a mirrored pair is defective, and how to physically replace the drive. The RAID Test section details how the drives were tested, and results of mixing drive brand/model types. Finally, the RAID Notes section provides information useful to field technicians servicing PCWS 2015 RAID configurations. This document assumes a two-drive RAID1 Mirror running in Continuous Update Mode. Other RAID configurations are not covered. Approved SATA Hard Disk Drives for RAID The drives listed in Table 1 may be used in single or two-drive non-raid configurations or RAID1 configurations. All drives are MICROS P/N 700352-345. MFG/Model Size RPM Cache Notes: Toshiba MK1665GSX Toshiba MK1676GSX Seagate ST9160412AS Seagate ST9160314AS 160GB 5400 8MB EOL (2011) 160GB 5400 8MB Production (11/2011) 160GB 7200 8MB EOL (6/2012) 160GB 5400 8MB Approved (7/2012) Table 1: Approved PCWS 2015 SATA Disk Drives To use SATA Disk Drives that do not appear on the list, MICROS recommends lab testing before deployment to the field. See the RAID Testing Section. Page 1 of 7
Replacing a SATA Disk Drive The Intel Rapid Storage Technology Utility may report: Your System is reporting on one or more events, and data maybe at risk. Double click the Intel RST Utility icon in the System Tray and press the Status button at the top of the page. The Current Status field may report Volume0: Degraded and Disk On Port (0 or 1): Failed. The replacement disk drive is assumed to be a new Seagate ST9160314AS. For example, the Intel RST Utility reports that a drive 1 has failed. 1. Power off, remove the AC power cable and place the unit face down to access the drive bay. Figure 1 shows the location of the PCWS 2015 Drive Bays. Figure 1: PCWS 2015 SATA Drive Locations 2. Using the hex wrench supplied with each unit, remove the appropriate drive cover. 3. Remove the defective SATA Hard disk drive. Page 2 of 7
4. Install the replacement SATA disk drive. The drive orientation (SATA data and power connector contacts facing up and towards the center of the workstation.) Make sure the drive is parallel to the base as you install it, or the drive connectors could fail to make contact with the SATA Interface Board. The lower section of Figure 2 illustrates this. Figure 2: Installing a SATA Hard Disk Drive Page 3 of 7
5. Replace the drive cover and return the unit to the operating position. 6. Connect the AC Power Cable and USB Keyboard and power-up. 7. When the Intel Rapid Storage Technology Option ROM text screen appears, press <Control-I>. The Intel RST Option ROM detects the replacement drive and displays a DEGRADED DRIVE DETECTED screen similar to Figure 3 that lists the new drive port number, Brand/Model number and size as shown below. Figure 3: Intel RST Option ROM - Replacement Drive Detected 8. Press [Enter] to select, then Press [5] from the Main Menu to exit the Intel RST Option ROM utility and boot to the operating system. 9. If the Workstation boots to the operating system, skip to Step 10. If the workstation fails to boot with the replacement drive, or if you choose to reimage at this time, the RAID volume should be deleted and rebuilt using the procedure below. All data will be lost on the remaining drive. Restart the workstation and press [Control-I] to enter the Intel RST Option ROM. Select [3] to Reset to Non-Raid. Press [Space] to select the drive, then [Enter], and [Y] to reset. Both drives should now display as Non-RAID Disk. Select [1] to create a new RAID volume and select RAID1 Mirror. Image the RAID. Recovery can be accomplished using the PCWS 2015 Recovery CF or other method. If the RAID is imaged at this point, the replacement drive does not require rebuilding in the operating system. Page 4 of 7
10. After the workstation boots to the operating system, testing shows the replacement drive rebuilds in less than one hour. While the rebuild occurs, disk performance is reduced as the contents of the remaining drive are copied to the replacement drive in the background. When the rebuild is compete, disk performance returns to near the pre-failure state. See the RAID Testing section for more information. RAID Testing A total of three PCWS 2015 units were used for testing, shown in Figure 4. A mix of Revision C and D System Boards along with BIOS Versions O1201r, O1301a, and O1301g were used to cover the System Board Revisions and BIOS Versions in the field. Figure 4: RAID Test Configuration Number 1 RAID testing consisted of two rounds. The first round ensures the drives listed in Table 1 are stable in a RAID environment. First Round A pair of identical disk drives from Table 1 were used to build a RAID 1 Mirror on each PCWS 2015 shown in the Figure above, again to represent the mix of board revisions and BIOS Versions in the field. A RAID compatible Windows XP image was installed, and BurnInTest V5.3 Pro from Passmark Software was added. From the Disk Test Suite, 100 iterations of the sequential data pattern read/write disk test was performed to ensure the system is stable. The test stresses the disk system and completes in about 22 hours. If the test completes, the SATA drive can be considered RAID compatible. Page 5 of 7
Second Round Testing After Round One, we have three known good units, each with a RAID1 mirror consisting of drives from Table 1. Three independent tests of each unit were required to ensure all three drives pairs run in all System Board Revisions and BIOS versions, then introduce the replacement drive. Due to End-of-Life issues with the drives shown in Table 1, the procedure on page 2 was used to introduce the current replacement drive, a Seagate ST9160314AS (P/N 700352-345) in Port 0 or Port 1 to simulate replacing a defective drive. Figure 5 shows the new configurations. TEST1 Figure 5: RAID Test Configuration Number 2 After the replacement drive is introduced, the unit boots to the OS and the Intel RST Windows Utility rebuilds the drive. After the drive rebuilds, 100 iterations of the sequential data pattern read/write disk test is performed again to ensure stability of the replacement drive. TEST2 and TEST3 After TEST1 completes, each unit was torn down, rebuilt and re-imaged with a different set of drives. For example, the pair of Toshiba MK1676GSX drives originally installed in PCWS#2 are now installed in PCWS#3. The replacement drive is introduced into each pair and the sequential data pattern read/write disk test is executed again. Once that test completes, the units are rebuilt and re-imaged a third time (TEST3) with a different pair of drives - again to ensure that all drive pairs run in all system board revisions and BIOS versions. The replacement drive is introduced, and rebuilds in the operating system. The sequential data pattern read/write disk test is performed again to ensure stability. Page 6 of 7
Summary The current replacement drive (ST9160314AS) can be introduced to an existing drive pair running on any combination of System Board Revision and BIOS Versions currently the field. The replacement drive can be expected to rebuild in one hour or less. In the future MICROS will continue to test new SATA drives as current drives become EOL using a Windows 7 Professional RAID compatible image. Performance During the re-build process, workstation performance is reduced. In all cases, after the rebuild completes, introducing the replacement ST9160314AS into an existing RAID1 reduced performance between 3% and 5% (based on the run times of the sequential data pattern read/write disk test before and after the replacement drive is introduced). RAID Notes During the course of testing several other issues concerning servicing the PCWS 2015 RAID were observed. Setting the 2015 BIOS defaults disables the RAID. The BIOS Defaults reset when the following actions are performed. Using the CMOS Clear Jumper J26 to reset the BIOS as described in the PCWS 2015 Setup Guide. Using the Load Setup Defaults selection from the Exit Menu. Performing any of these actions causes the Interface Combination field in the HDD Configuration Tab to revert to [ACHI], disabling the RAID. If you perform any of actions listed above, you must re-enter the BIOS and change the Interface Combination field to [RAID]. Attempting to boot from a RAID image with the Interface Combination field set to [AHCI] will fail and may corrupt the image. Moving a RAID1 pair from one 2015 to another 2015. Not all combinations of system board revisions and BIOS versions have been tested. However, during one test cycle a pair of Toshiba MK1676GSX drives were successfully transferred from a Revision C board with BIOS Version O1301a to a Revision D system board with BIOS O1301g. Other combinations should be possible as long as you: Avoid mixing drive ports. The drives removed from Port 0 and Port 1 of the source 2015 should be installed in Port 0 and Port 1 on the destination 2015. After power-up, immediately enter the BIOS and proceed to Advanced - HDD Configuration - Interface Combination to ensure it is set to [RAID]. Save settings and restart. Page 7 of 7