The disk array cabinet alarms and safely closes the disk array cabinet

Is there such an alarm software?

We recommend that you go to Storage Manager to view the system logs before making a judgment.

You can call IBM technical support at 800-810-1818

The shutdown order is correct, but shutting down the array is not about unplugging the power cord between them! In the disk array shutdown mode, you can select the command to turn off the disk array on the front LCD panel. Or you can log in to the backend of the web page and choose to close the system.

The reason for the self-test should be that the data in the disk array cache has not been written to the hard disk before the power is turned off.

There are many types of RAID, generally RAID

Do RAID with at least two hard drives.

Depending on what you do, if you elaborate, you can write a book.

The general way to do it is RAID

0, fast and big.

EXP can be regarded as a value-added part of DS, DS can be used independently, EXP cannot.

The disk cabinet can be regarded as a simple 1+1 or the simplest array, and the predecessor of the disk array is a high-end technology used in the server field, and the main application is to ensure the integrity of data. This is something that a disk cabinet can't do.

disk array. The hard drive is damaged. It does not affect the normal operation of the system, but the disk in the disk cabinet is damaged. It is possible that the data is lost. Disk arrays don't have such annoyances.

The former is a conceptual noun, and the latter is a real hardware device.

Such as table tennis matches, tables.

Disk Array with Controller The disk cabinet is an expansion cabinet, try not having a controller

Yes, the enclosure is the same as the SAN and can only be used by one machine at a certain point.

In fact, it is possible to operate shared disks together at the same time. But the problems that arise are unpredictable. Tried.

Of course not, Rose Ha is a type of HA, and his role is to ensure that both systems work properly.

As soon as there is a problem, the other one will do the work. Of course, after the other one is ready, to reconnect to the HA system, you need to configure the settings of this reinstalled roseha. This rose is definitely in the installation documentation.

The following information refers to Rose's working mode.

Active standby The master works and the slave is in the monitoring readiness state. When the host goes down, the slave takes over the work of the host, and after the host recovers to normal, the service is switched to the host automatically or manually according to the user's schedule.

Active Active: Two hosts run their own services at the same time and monitor each other's conditions. When one host goes down, another host immediately takes over its work, ensuring uninterrupted work.

For SAN access, a storage resource can be read and written by only one server at a time. NAS can be read and written by multiple servers at the same time. Generally, like MSCS and HACMP, even after the two-machine cluster is completed, only one node accesses the storage at a point in time, and the resources are automatically transferred to another node after the failure.

Specifically, depending on what type of storage it is, relatively speaking, the more high-end, the more comprehensive the protection of data. Purely from the perspective of the life of electronic devices, the damage rate of hard disk is the highest, even if it is the most high-end storage, it is inevitable that the hard disk will be damaged, but it has almost no impact on daily data, followed by the controller of the disk array, which is generally double redundant, and the possibility of damage is also very small, so the disk array is relatively safe.

Whether it is IBM or other manufacturers, the disk array generally has a 5-year service cycle, and 5 years is a cycle of equipment replacement from the life of the device and the general business development needs.

Of course, the safest and most secure thing for important data is a reliable backup.

The general lifespan is about 10 years.

It is divided into the following points:

1. IBM storage equipment is generally placed in the computer room, and the environment of the computer room is required, such as: constant temperature (20 degrees Celsius), constant humidity (40%), raised floor, ash layer treatment facilities, fault alarm, carbon dioxide concentration detection device, etc. If the server in the computer room reaches this condition, the service life of the server placed in it will reach more than 10 years.

2. For the disk array cabinet, in the case of maintenance, the hardware failure and system error should be dealt with in time, so as to ensure that the storage works consistently in a stable state, which is conducive to improving the service life.

3. If the above requirements cannot be slowed down, improper maintenance will greatly reduce the service life of IBM servers.

To sum up: it is not a problem to use it for 10 years in general.

According to the situation of LZ, the first choice can be to use SAS (serial SCSI) enclosure, which can generally connect 2 4 servers, install more than 10 disks, and can be failed over in the Windows 2003 enterprise environment, which is suitable for the primary database application environment;

In addition, there are FC (optical fiber) enclosures (burning money) and iSCSI enclosures (Gigabit network cable connection, only 40MB s) available, which can connect more than 4 servers.

In addition, NAS cannot be used in database application environments, so you can ignore it.

Turn off the alarm and it will be okay to temporarily power off without affecting the hard disk.