Draft Document for Review February 7, 2020 3:15 pm 8464ch07_Upgrade.fm 2. Vary offline all logical drives in this cluster. The IBM SSR places this cluster in service  mode (if part of a grid) and offline. All physical drives must be unloaded and emptied of  cartridges. Next, from the TS3500/TS4500 MI, the drives must be unassigned from the  TS7700T Logical Library. 3. Drives now can be removed and the new drives can be installed in their places. The IBM  SSR installs new drives, and checks the configuration and firmware code level by using  the TS3500/TS4500 MI or another tool. If necessary, the IBM SSR updates the firmware  level of the new drives. If a TS7760T is used, 16 Gb switches are necessary. 4. New drives are assigned back to the TS7700T Logical Library by the TS3500/TS4500 MI,  and the control paths are correctly assigned. Drive fiber cables are reconnected, and  connections to the switches are verified. If everything appears correct, the IBM SSR runs  a drive reconfiguration at the TS7700T cluster.  5. After the reconfiguration, all new drives and paths must be available and healthy. If not, the  IBM SSR acts upon the errors to correct them. This step completes the drive upgrade  change. Now, the TS7700T can be taken out-of-service mode and varied online by the  IBM SSR.  Remember:  In the previous scenario, all cartridges in the filling state are closed if the new  drives do not support writing in the original tape format. Otherwise, the cartridges continue  to be written in the same format to the end. Scratch tapes that are in use after the change  are automatically reinitialized to the new tape format. You can apply the same procedure when changing the tape emulation mode in the TS7700T  from 3592-J1A emulation to TS1120-E05 native mode. All steps apply except the steps that  relate to changing drives physically and changing drive emulation mode within the TS3500.  Drive emulation is changed in the TS3500 web interface (see Figure 9-95 on page 533) by  using a specific command in the TS7700T by the IBM SSR. The media format is handled as  described in the previous scenario. Migrating TS7700T data from sunset media type after upgrading  heterogeneous drive configuration Consideration:  Restrictions apply to some configurations. For the valid combinations of  media type and drive models within the TS7700T, see “Tape drives and media support  (TS7700T)” on page 137. This procedure can be helpful when upgrading your tape drives to the TS1150 3592-E08 tape  drives, or when replacing the media cartridges with a newer type to increase the storage  capacity of your library. The E08 drives cannot read JA, JB, or JJ tapes; therefore, you must  have JC, JK, JL, or JD media for the TS7700T to support new logical volumes that are written  to TS1150 drives. You also must have at least two drives of a sunset generation that can read  logical volumes from JA, JB, or JJ tapes. In this scenario, coming from a previous 3592 tape drive model to the E08, all JA, JB, or JJ  media are  sunset , which means that after reclaiming the active logical volumes still contained  in it, the JA, JB, or JJ media can be ejected from the library. In this case, you must have a  working pool of stacked volumes of the supported media, such as JC, JK, JD, or JL. Your  data, formerly in a JA, JB, or JJ media, is forcibly migrated into the supported media.  278  IBM TS7700 Release 5.0 Guide