I. Phenomena:

recently, storage monitoring received alerts: XX storage, expansion cabinet connection module failure, Expansion module (Disk Enclosure DAE000, expansion module A, item 03050AYD,XX is faulty. Error code: 0x4000d049.

II, root cause location:

finally, if the cascade module of the expansion cabinet fails, the cascade module of the expansion cabinet needs to be replaced.

After the spare parts arrived, because when the spare parts cascade module was plugged in, the reverse front and reverse front were not clearly distinguished, which caused the stitches on the back plate of the expansion cabinet to break. Do you think the back is not back, as a result, the disk identification is incomplete and some disk links are not redundant. Therefore, the expansion cabinet or disk cabinet needs to be replaced. Disk roaming is used, and finally the replacement is completed in a short time window. Dozens of disks, in a very short time, complete from the expansion cabinet DAE000 to DAE010 roaming or drift or position change, once again experiencing such a exciting disk roaming technology.

III, conclusion:

most of the storage supports disk roaming, which used to be traditional RAID, all are in disk units, if it is a piece4TB of SATA disk, when changing, when roaming, need to reconstruct, time varies from dozens of hours, Xiaobian has encountered72 hours, worried, one piece is over, change another piece, time sea is gone.

For this storage, in the case of dozens of disks1-2 in an hour, it was finished from the expansion cabinet0 to the expansion cabinet1 the fast roaming, the business has no perception from beginning to end, can be called silky.

The main reason is the current RAID upgraded, not the original disk unit RAID, changed to in slices or data blocks RAID2.0 or RAID2.0, and scale in the column, holding dynamic RAID, make the original8 2 of RAID6, instant indentation becomes7 2, the old data is read unchanged, the new data, according7 2 write, no sense of business, wait within the specified time, for example5 within minutes, each storage store may have a different set time to complete disk insertion.

The feeling of Xiaobian, now RAID2.0 it is really great, dynamic contraction is really great, great disk roaming.

Then the problem comes.

1, are all supported RAID2.0 or RAID2.0 is the storage of this technology or mechanism like this?

2, does it support indentation?

Finally, I would like to remind you that disk roaming is really great and scale-in is really great, but it is better not to use it, not to do it, not to malfunction, and it is better not to encounter it for a lifetime, in case it appears bug well, what if a disk is pulled out and broken? What if there is any unpredictable risk?

Attached:

for products that support RAID2.0 and downgrade, can we write an advantageous parameter for those that do not support RAID2.0? Is this parameter very practical, it is really useful to users, and it is really valuable.

It is more practical than the conventional parameters on the side of the road, such as a basket of 4-control, 2U25 disk position, 8 Bad 7, and the top IDC, Gartner Leader, and so on. It is not easy to be challenged, the customer actually needs double control. What's the point of writing a four control? What's the difference between 2U24 and 2U25? Just for control, is it more difficult for this kind of user to be challenged, it is easier to convince the inside and outside. I really need it. You have to let it go. No one can tell the security risk, can you?

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